My Bugera 333 has an unbalanced line out, and I already know I can't plug headphones into it (they didnt make any sound). Would I need to plug that line out into a mixer before I could use it to record?
You could just run it into your pc, but you won't get a good sound.
How would I get a good sound?
Micing the cab up with a SM-57 and recording through an interface or recording desk.