Weight loss and addiction (13m)

I need to find the fastedt and most effective way to lose weight. I’m 200 pounds and only 5’9. I’ve been bullied about being overweight since the fourth grade (I’m boutta be a freshmanu) and it seems like everything I try leads to nothing. it got to the point where I became addicted to weed at one point just to forget about the bullying. it has ruined my life and I need to find a way to fix it.