Big budget multiplayer games with anti-cheat engines are likely to give you a hassle. Otherwise you’re probably fine.

The best thing to do is to make a live USB of some distro (probably Ubuntu, maybe Mint or Pop!) and try running from the USB for an afternoon. If you like it and everything seems to work, you can go ahead and install the OS. It’s very easy if you want to do a clean install (erase everything). Keeping your files from Windows is also possible, but about as complex as installing a mod loader on a game, and you’ll want to look up some guides for that.