i started on mint, with a 2080, played through hl alyx (with one weird issue - when i had my old xbox 360 controller plugged in, alyx and vr home couldn’t start, but that was a few years ago, maybe it’s not an issue any more).
which is to say, the index is not the issue, most vr games don’t have a native linux version, so you have to rely on proton, and especially with nvidia cards they’re far from guaranteed to run