Tips for character creation?

What kind of tips are you looking for? Do you mean that you want to create characters with a lot of depth and backstory? Or do you want to min-max and create a very powerful character? Or just some general tips for how to come up with ideas? There are a lot of resources on youtube, and for example if you're interested in roleplaying and character depth I think Ginny Di might provide some ideas and suggestions. I don't have any links for min-maxing because I don't play that way myself, but I'm sure those exist too. If you only want a little inspiration to get started I think a character generator can serve as a starting point, and you can modify and/or expand on the random character until you get something you like.

Personally I find a lot of inspiration in watching professional DnD (there are indeed people who get paid to play TTRPGs), such as Exandria Unlimited: Calamity which is a prequel/spinoff to Critical Role (a group of voice actors) and a collaboration with Dimension 20 (a group of comedians). Just don't expect all your home games to be like that, at least not in the beginning.

As for finding groups, you could be the first person to post to /c/dnd_lfg@lemmy.world :) If you live in Sweden there's the Sverok national organization that sponsors tabletop and rpg clubs all over the country. Otherwise you could try finding a local store which sells these kind of games and ask there.