I use mint on two different machines with Nvidia GPUs. One is a several year old desktop with a 1080 and the other is a two year old Dell laptop with a discrete nvidia GPU in addition to the Intel one on the processor.
Now granted I don’t play a ton of games right now, and when I do they usually aren’t cutting edge, but I don’t recall many problems so far. I use NVENC for Jellyfin and editing videos more often, and that has been pretty smooth. The one issue I had was related to that though. Kdenlive (flatpak) updated and could no longer export videos because it was looking for a newer version of something my mint-supplied nvidia driver wasn’t yet updated to have.
Trying to install a newer driver manually was a whole damn thing though, so I rolled back the kdenlive flatpak to the one that worked.
If you are the “computer person” in your family, you probably have experience screwing with, breaking, and fixing whatever OSes you have used over the years.
The refreshing difference with Linux is that the software and the people who created it are not trying to prevent you from doing what you want with your computer.