That depends on what that other stuff is. Bazzite is a desktop OS first, gaming second. But it us atomic, so installing apps that aren't available as a flatpak is somewhat more complicated.
Mint is a great start though, I seriously doubt that you will have problems. Just don't be afraid to experiment.
I hope this holds. There have been several such migrations in the past, and they didn't last. Seeing as it is just email and not the entire OS/software landscape, it will probably hold.