Looks like you’re running on Intel (i suppose it’s laptop)
Try forcing Nvidia card with something like gamemode
P.S. There’s whole Linux gaming [Guide] (see requirements section for a minimum to get started) and you can always ask here, no need to google 
btw, some report:
Proton 6.3 and Proton Experimental just render a black screen with HUD in-game.
(c) https://www.protondb.com/app/208200
So try either with Proton 5.13 or some GloriousEggroll or TKG engine