Leaderboard

You don't seem to run High Sierra with graphics acceleration so I'm tempted to say that you don't even have a sound base for anything else. I would suggest you start by installing Mojave as per my Mojave guide by following to the letter, then upgrade from Mojave to Catalina as per my Catalina guide. Good luck.

'beats me. No issues with Catalina 10.15.7 (build 19H2) downloaded from AppStore and patched with Dosdude1's patcher for 10.15.7.