I still see people asking which distro to use, is it ok if they have an Nvidia card? How ready is Linux for a gamer? I have been 8 months now on Linux, it's about this hard to have an Nvidia card: click update. The way I switched was to populate the second m.2 slot on my MB and install Linux there, I chose Nobara, that way I had the fallback of Windows 10 if I had issues. Well, I still have Windows 10, it exists as a console with no internet access, it runs my Skyrim setup with it's 982 mods that I can't be arsed to move. Everything else is on Linux, it's the default and daily driver. Look close, you can see my system automatically updating OpenMW for me, quietly supporting my 260+ mod remaster of Morrowind. If you're wondering whether Linux is ready for gaming, yea, it is. Give it a try.
I used to have a Nvidia card when I started my Linux lifestyle. It wasn't that big of a deal but a few things were broken especially with Wayland, which was hot garbage at the time. I switched to AMD for ideological reasons a couple years ago, but almost all of the problems had been resolved. I assume now only extreme edge cases would be a problem.
As far as gaming, I used to use ProtonDB before every purchase but now I just assume shit will work with a few exceptions. I don't play games that don't run on Linux so im missing out on CoD and a few other competitive games, but on the whole I don't care about those games anyway. I have hundreds of games in my library and they all run beautifully on Linux with no tinkering, I can't even remember the last time I had to fix anything.
Honestly it's gotten boring, come to realize I actually prefer tinkering to actually playing games.