I dont know much about proton but for some games people always say that the experimental is needed. Do you have to download this thing or is it already an option aviable in the games? Forgive my ignorance
Proton is usually downloaded automatically.
But if you’re running into issues launching a game, you could manually select a proton version via the settings button (cog) on the far right of the play button.
Go to compatibility and use the drop down arrow to choose a version of proton.
I usually have it defaulted to experimental and haven’t had issues with that.
You can also download unofficial versions of proton called ProtonGE, which sometimes have better compatibility fixes than Valves official proton. Just YouTube Proton and ProtonGE. Tons of tutorials out there.