Ways to make money( legal or illegal)?

I am 16, I have a job but i need some more money. Please don't ask for what, its not for drugs or anything like that.I am looking for the best way to get money, legal or illegal. I was considering getting involved in selling like weed or something. Ive done it before and know some people who sell. Should I just get my hands on the cheapest stuff and overprice it? Please help me out, try not to be sarcastic haha. Im not doing prostitution haha. Just let me know of some ideas, and please go into detail