Converted recently and happy to find that all but one (relatively niche, command: modern operations) game I played work on linux out of the box. Decided that I'd rather claw back control over my computer and switch rather than have a single game working. Haven't looked back since. Check your library in protondb, it may surprise you.
Nvidia works fine on my end, just installed the latest drivers and been running fine since I switched (~1.5yrs)