On fedora it’s simple, you enable 3rd party repositories during install and then you install it from the software center.
Does Wayland work with Nvidia
Your experience will vary, it works fine for some and not so fine for others afaik.
Most distros are moving to Wayland, how do I ensure an Xorg session.
Distros that are moving to Wayland still provide an Xorg session and probably will do so for the foreseeable future.
Will proton work on fedora.
Yes. Proton is distro independent, it’s a tool, provided by steam and it doesn’t really care what distro you are running. Remember to enable steamplay for all games from the steam settings before you do anything else.
Will installing steam as a flatpaks work?
Yes. I’ve heard that some people have had issues with the steam flatpak, but I personally haven’t, it should work fine.
Can you not play anticheat games.
Entirely depends on the game you wanna play. Some anticheat games work, others don’t. Check the game you wanna play on protondb to see if it works. That being said, afaik anticheat support outside steam is basically a non existent, so if you like playing valorant (you poor, poor soul) or Fortnite for example, you’re kinda out of luck, unless you wanna dual boot.
Note: Try the distro before installing, live ISOs exist for a reason.