Your endocrinologist is very likely to be as dubious as your father is. You want a female body, but hormones by themselves would never transform your male body in a female body. At your age females hormones would only give you small breasts, but you are fat, so you are more likely to get a gynecomastia than real breasts, the effect on fat distribution would be barely seeable as well.
Do you really want to look like a male with gynecomastia ?
The first step for you would be to loose your excess fat and improve your waist-hips ratio and prove your family your willingness.