I've found that Linux enthusiasts have a tendency when they're writing tutorials to assume that you know a bunch of things that you don't necessarily know. Once you learn those things and get everything set up, it is indeed very easy as the other commenters said to run games on Linux (and in my limited experience, the games I've run through Wine and Proton generally run better than they did on Windows), but it's disingenuous to act like there isn't a knowledge wall you have to get over first. Expect to spend at least a couple days fucking with things until you get the hang of it.

Anyway Lutris is a magical program that will put all of your games from Steam, Epic, GoG, Itch etc into one place and make running them either work out of the box or at the very least make adjusting the settings to get them to work very fast and easy.