Which birth control?

Kr
So I'm 16. I'm a fairly heavy set girl, I'm over 200 and I'm 5'6 but I was wondering what type of birth control would be best for my age height and weight? Please no hate, I am loosing weight, and I'd prefer a birth control that doesn't make me gain weight, kinda sick of these paralyzing back cramps I get all the time, plus it would just be better. Thanks in advance!