well u'd probably need a parents consent and it probably wont be cheep.
but really i mean, do you really wanna do that when your just 14? i know its hard but u just have to keep trying. you should join sports teams with your school. you should make sure your always doing a sport. it probably not too late to join cross country and its really easy to lose weight when you do cross country. if you really wanna lose weight then dont eat anything with a bunch of calories. no chips no soda no pizza none of it. try to stick to healthy foods like eggs for breakfast, a sandwhich for lunch and something really low in calories for dinner. you could try weight watchers...