You can use my post as reference: https://feddit.de/post/9087676
You can use any distro you want for gaming. Maybe try to choose a more popular one, niche distros like Nobara often aren’t as secure as major ones.
I would advise against Nobara. Why?
What else would I recommend? Bazzite (if you use your PC only for gaming) or the various other images from universal-blue.org
Why?
Proton is just the compatibility layer, which allows you to play Windows games on Linux.
It’s one of the main reasons so many people switched to Linux in the last months and years, since Proton gets even better from week to week. Something, games designed for Windows run even better on Linux (Proton) than on Windows!
From what I’ve heard, requiring Proton isn’t that bad, especially for the devs. Often, games engineered for Windows run better on Linux than the same ones for Linux.