linuxmemes

Some games proton might not be enabled by default - on Linux go into the steam game settings for the game you want, click the compatibility page, and check the box "Force the use of a specific Steam Play compatibility tool", select the version - if one doesn't work, try another - proton 8 is a good start, proton experimental is usually a good second option. Wait for steam to download proton if it hasn't already, and the game should now play like normal

Note: some games might require additional configuration, or custom versions of proton to work. Other games won't work due to anticheat.

https://www.ProtonDB.com is a good option to check on games and see how to get the more complicated ones running.

https://Areweanticheatyet.com is a good way to see what games that have anticheat will work and what won't work.

For non steam games running proton try installing the heroic games launcher - it's like a combined launcher for Epic, Gog and Amazon Games.