Technology

(Taking your questions seriously and attempting to offer genuine and practical advice with some of my usual psychotic sense of humor)

There aren't billions of versions of Linux, only tens of thousands. Of those, some are meant for servers, some are meant for embedded devices, some are meant for supercomputers, some haven't been updated in a decade and some are for specific weird niches. Filter out the joke ones like Hannah Montana Linux and what you'll have left are five major distros called Red Hat, Debian, Slackware, Arch and SuSe. These five are quite different from each other, they do things like develop their own package managers and such. Most other distros are minor modifications of these, most of the time just including a different desktop environment or included software. Debian's forks include Ubuntu, Linux Mint, ElementaryOS and Neon. Fedora is a fork of Red Hat, Manjaro, EndeavourOS and SteamOS are forks of Arch, and I'm sure Slackware and SuSe have been forked too. The majority of forks are "What if this distro, but this desktop instead of that one?" This is why there are three different versions of Linux Mint, your choice of Cinnamon, xfce and MATE desktops. How do you choose? Try a few and see which one you like best. They're all free.

You can play Steam games on Linux. Valve has gone BIG into Linux compatibility, their Steam Deck handheld gaming PC ships with a Linux operating system called SteamOS which as previously mentioned is a fork of Arch Linux that comes with the KDE desktop. They have a compatibility layer called Proton which, if I understand the tech correctly, translates DirectX API calls into Vulkan API calls which Linux can understand. At this point, the vast, vast majority of Windows games just work on Linux. The one big sticking point at the moment are kernel-level anticheat systems often used in competitive multiplayer games. The developer has to specifically choose to release a Linux version that enables this, and most don't. So there are some games to include Fortnite that the developers have specifically chosen to not run on Linux. I've been PC gaming exclusively on Linux for over a decade now.

A lot of Linux users are indeed programmers, developers or sysadmins. I'll remind you that Android and ChromeOS are also both Linux operating systems. Many distros these days have complete and polished graphical desktop environments that make the OS similar to use to Windows or MacOS. Take a look at Linux Mint Cinnamon Edition, I bet you'll find your way around.