The All Guardsmen Party.

@giriinthejungle

Anything by Harry Harrison (Stainless Steel Rat, Bill the Galactic Hero). Fun kind of silly but mostly challenge authority.

Spider Robinson (Callahan's Cross Time Saloon). Fun stories mostly about relationships.

Rendezvous with Rama by A. C. Clarke. Honestly, anything by Clarke fits your criteria very well. Very little world building or character development, just straight to the point hard (but still amazing!) sci-fi. His short stories are fun too.

P.S. You may stumble across legends that Rama has three sequels. Don't believe them, there is only one book. And even if it were true, the sequels wouldn't be written by Clarke despite him being listed as a co-author.

Philip k. Dick ' Do androids dream of electric sheep?' and 'Ubik'. He also made some great short novels.

Clifford d Simak wow a lot of very relatable stories that feature interaction as well as the tech. Kind of like Stephen King in relation to horror.

Nathan Lowell's The Golden Age of the Solar Clipper series is great, it's a space opera following normal people trying to make a living in space. It's a nice break from the hard scifi where everything goes wrong and the hero fixes everything, it's just a nice entertaining stress free read.

The Windup Girl
The Water Knife

Both by Paolo Bacigalupi - I'd describe both as ecological dystopian near-future sci-fi - both books are exceptional and based on Earth.

I Thoroughly enjoyed The Dispossessed by Ursle leGuin. Just enough world building to destroy it all in the narrative.

I just want to put this out here, to ponder...it's essentially a skill to be able to juggle and take in new jargon and stuff. It's something you learn. I learned it as a child, so it's second nature to me--but there was absolutely a time when I struggled!

So the question is: Do you want to develop that skill? (You don't have to answer me, I'm just proposing the question so you can ponder it.) I'm assuming here when you say the complexity is what puts you off, that this is accurate. And maybe it is. But there's a bit of a slog initially when reading SFF where you have to power through to gain the skill to follow these things--you're literally training your mind to take in new data in a way that doesn't much happen outside of SFF.

But also...what if the reason you bounced off the books listed is something else? What if it's not complexity, but the delivery? The style of narration or prose? A lot of the works you list MANY people bounce off, not due to complexity but due to the authors' voice and delivery.

I myself can't get into WoT or the book version of Game of Thrones or Foundation. I can't get into Tolkien either. Which is an abject sin in some circles!

But it's not because those books are complicated. Or because of the jargon. I'm fine with both in many other books, and disliking certain well-known behemoths of SFF doesn't negate that I read things like The Quantum Thief by Hannu Rajaniemi (which was pretty darn confusing and complicated) or Gideon the Ninth. Or all the stuff I read as a kid.

It's because the specific writing style turns me off. Asimov, for example, is kinda known for his cardboard characters. Tolkien world-builds like an academic, and a lot of his stuff is a huge slog like much dry research in academia. Wheel of Time likewise doesn't have that "something" in style or voice to make his worldbuilding engaging, nor does George R. R. Martin's Game of Thrones.

But I am a huge fan of authors who make big, complicated worlds who have a more interesting/engaging way of presenting what they have created. It's not the complexity or jargon that puts me off in those other books, it's the writing style.

Maybe it's the same with you?

I recently read and really enjoyed Psalm for the Wild Built by Becky Chambers. The book is more of a solarpunk future with a heavy focus on the characters. It's pretty short too! All takes place on a single planet, felt very grounded after I just finished with a Culture book.

Lots of the classics aren't super space travel-y. Stranger in a Strange Land, Childhoods End, War of the Worlds, The Time Machine, Ender's Game.. Animorphs 😄

Dune but I'm not that far in yet

Late to this party and I have to agree to Ian M Banks, Ursula K Le Guin, Philip K Dick (very weird, discontinuous, but free-floating and fascinating) and many more. Just to add a couple of things that HAVEN'T been mentioned, that really may get your sci-fi juices flowing: Brian Aldiss's expansive "Helliconia" trilogy is a cracker - and I think you may see echoes of it in the premise of "Game of Thrones". I'd also like to plug John Brunner - his work "The Shockwave Rider" is dated now, but essential reading. It is the first book to ever feature the idea of a computer virus. Also DO follow up on "The Machine Stops" by EM Forster - full text available online for free. If it doesn't BLOW YOUR MIND that it features social media overload, and was written in 1909, well, nothing will.

In new wave sci fi, you might also want to check out J.G. Ballard - too weird and hardcore for many, but the missing link between Moorcock-style sci-fi and mainstream fiction - think 1960s to 1990s Black Mirror. One last recommendation. If you have time and interest, check out the much neglected and ultra-weird work of C.L. Moore. Her "Northwest Smith" character is the prototype for Han Solo for sure, (Space Pirate and smuggler with a concealed heart of gold, flies a deceptively fast ship with just one crewman, who's an alien. Carries a "heat blaster" which is also configurable as a energy sword. Too many coincidences!)

Possibly Existence by David Brin? There’s some stuff around space travel and alien contact, and it ain’t exactly a short, but is mostly set on a future earth.

There’s also a lot of “future jargon” which grates a little, but is quite fun to look at something written in 2012(?) about a future involving wearables and AI among others.

Ann Lecke’s “Imperial Radch” does happen in multiple locations, but revolves primarily around people relationships and de-genders English language for a delightful effect.

Peter Watts will make you learn a lot of words and concepts, will have you read author notes at the end of his books, and will have you take a look at the list of scientific literature used in writing said books. Main overarching topic - consciousness might not be as central to intelligence as we default to thinking it to be.

Charles Stross’ books can take you into space, but are hardly about space or new worlds. Hell, the most space travel heavy book of his I read - Neptune's Brood - explores the ideas of money and debt.

Greg Egan’s everything, but there are two that I immediately remember when I think about his bibliography. “Diaspora” explores weird space times, consciousness bootstrapping, and problems of communication. “Orthogonal” trilogy is “math of spacetime: what could be” as a novel.

Cory Doctorow explores problems of identity and privacy. Start with “Little brother” (yes, it is a 1984 reference) and “Down and out in the Magic kingdom” and expand further.

John Meaney’s “Nulapeiron sequence” is an easy read that builds its world alongside shedding its main character ignorance.

Short stories are the best way to go, anything by Ted Chiang for example

Dan_Simmons : ( Hyperion ) Also has world building nothing crazy. Involves multiple timelines. But written as a space opera. Think ( The Canterbury Tales )