supplementscene: Thanks for your kind giveaway. I suppose my question would be how technical do you need to be to set up Linux and what percent of games work off the bat?
How technical you need to be when installing Linux depends on the setup you want to make.
For a computer that only has Linux as operating system, not so much. When installing there's an option to just erase all disk and Install Linux automatically
If you want to dual boot with windows, things got a bit technical. You need to know about partition, and how to set it up for both OS. Some newer Linux like recent Linux Mint has the option "Install along side WIndows" which make things easier.
I still manually set up partition for my dual boot installation every time I install OS because there's too many data there and I can't risk an automatic process destroy them (did once, never again)
Regarding what percent of games work , I suggest you look up / ask around first what games you wish to play on Linux. and then decided if you'll be OK with whatever available on Linux. Easiest way to do it is to go to GOG / Steam and filter games by OS
Currently, there's not so much AAA games on Linux. We're lucky Square Enix west supported Linux by having Feral porting their games to Linux (Rise of Tomb Raider, Deus Ex Mankind Divided for example). Another high profile games are Civilization 5 & 6. Some multiplayer FPS, etc. I really wish Bethesda would consider Linux. I like some of their games, but they are not available on Linux. Elder Scroll, Fallout, Dishonored.
There is a software on Linux called "wine". That is for running windows application on Linux. Many Linux users use it to play windows games on Linux. I myself use it with Deus Ex ( 1, Human Revolution), Clive Baker Undying, Dishonored, etc. Anything that's below DirectX 10 has a good chance to run. While wine support for DX10/11 is WIP and shows a good progress so far. If a game is good and popular, wine developers are trying to make it run better. That's why The Witcher 3 runs almost perfect on it (there's still some issue that's being worked on)