Thanks!
Yup, a tutorial is totally planned, my hope with asking for feedback was to figure out which thing needed a tutorial. There's also gonna be some simple animations.
I don't think there will end up being a way to select which song your band plays, because the final game will ultimately be focusing more on the visual novel aspect rather than the battle aspect... like, the story will be the main draw, the battle system is just the part I finished first to make sure the mechanics were working!