Even if Mint (Cinnamon) doesn’t look as good as GNOME, you can always install another desktop environment.
I’d recommend fedora silverblue. You’ll install all graphical packages via a Software store and you won’t brick your system. Even if, you may just recover an old state. I installed media codecs via the software store, not command line.
maybe jellyfin.org/docs/general/server/media/movies/#mu… ? I stopped trying to manage a library with mixed languages. German torrents always (most of the time) have the english audio as well. For english only, there’s a dedicated folder