I do not have an Nivida card, but I udnerstand Nvidia on bazzite (and linux in general) is tougher than AMD to get things working nicely. As for the terminal, I have never once NEEDED to use to terminal in the last year. I have of course used it to do things, but it was rarely the Only way to do what I was trying to do. Maybe what I am about to say is unpopular, but once I stopped trying to install programs that dont have a flapak from the bazzar store, my life got easier. Of course to counter that statement, I have several programs that are appimages that I control via Gearlevel, then a few windows apps running via faugus. Also if anything tells you to use lutris, it is wrong, lutris imo is crap, and should not be sued ever; Lutris has not worked once for me.