How much is the speed drop from translation using Proton? Is it so big or just small? Hows the performance of cartoonish Windows only games? And whats your hardware and how much is the price? I’m sorry but I cannot test it myself because I’m still on my mobile. Can you also tell about how many games are compatible with Proton? What about non-popular games?
try to have only one graphics card or something that can “mux” properly on linux.
try not to have secureboot for the Mobo.
EDIT : Check the driver compatibilities for all your components.