I still rely on Windows for a few important things (namely a Club Penguin Singleplayer Client that I’m not sure works on Linux), but I absolutely will switch to Linux as soon as I’m fully ready to take the leap.
Debian seems like a nice distro (am I the only one who calls it “deebian”?)
Only way to find out is to try it. Something like Club Penguin shouldn’t give you much trouble especially if you use a launcher like Lutris.