I have been able to play most games fine on Linux mint.
If he plays Minecraft bedrock he can use “Minecraft bedrock launcher” which loads the android version (if you own it on the play store). Minecraft Java works find on Linux, but I prefer bedrock to use a controller.
Some PC games I play in “bottles” which lets you run windows programs.
I also have “heroic games launcher” that lets me play epic games, gog games and Amazon games.
Maybe start with more simple things? What I feel is simple is like oatmeal or pasta.
Maybe take a cooking class? They can teach you how to do things so it won’t be as scary.
My wife suggested watching a lot of cooking YouTube videos.