From my experience (Linux Mint exclusively) you might need to edit config files, fiddle with drivers and packages, and compatibility software like wine, lutris etc. ChatGPT proofed quite helpfull with most of these tasks, and there are passionate ppl on lemmy ready to help you out.

Gaming is in a great spot imo. I can run abt 90% of my steam games thanks to proton, and I was pleasently surprised that some EA games ran without the EA client. Competetive games on the other hand are a bit of a gamble since most of them don't have an anti cheat solution for Linux and won't run.

Just install Steam or GoG and play the games through those. Then all the configuration work is done by the Steam/GoG crew. You just buy the game, install it and play, out of the box. About a quarter of Steam's games work on Linux. The only thing I miss is something akin to Skyrim or Witcher. Factorio works and Stellaris works, so I'm happy :)

EDIT: Ok, Steam's American. But GoG is Polish.

Oh, don't worry about games. With Steam's Proton, they work like a charm (there are exceptions of coarse, but the majority does). Sometimes even better than on Windows. For non-Steam games there are options as well.

The biggest problem I've seen people struggle with when migrating from Windows to Linux is that they do things the Windows way, but this is a different operating system, so obviously it doesn't work and they get frustrated. The hardest part of switching to Linux is being able to and willing to learn how to use a computer again, but from a different perspective.