Broo... Omg!!! Back problems at 19???
What have you done to your precious youth??!!! Exercise regularly bro, jogging or do aerobic, but don't go to the gym, it'll only worsen your back.
Shit... It's hard for me to say something else.. I don't know your circumstances so all I can say is gambarreee? Hehehe you really work hard for your life. I pray for your success bro. I really will pray for you!! Gambarreee!!! and please don't give up on your music.