Dunk help for high school bball player?

im 6'1 and 179 lbs i can grab rim and i've been doing box jumps every other day with weight vest 3 sets of 10 wit vest on and 10 more with vest. i also got resistance bands but don't know any good exercises that will help. and i do the mvp vertical jump program and it includes excersices like squat leg press calf press e.c.t and i stopped progressing. i work to the max every session and not seeing progression. i thought about taking a fat burner to loss weight. what should i do?