Well, Here is some info to help you out. First; you can not get a MMJ license if you have a drug related criminal offence in the last 10 years. So try to get off with alternative measures.
If you are under 18, or aboriginal and this is your first offence you have the option of alternative measures, which = no criminal record but you will have to do something stupid like addiction therapy, probation, community service ect, ect. I am assuming you are under 18, so good luck with probation. If you want MMJ Card, Insomnia or ADD/ADHD are very common mmj illnesses. Good Luck! Shoot me a PM with your cellphone number if you need some information man, here to help!