Ok, I see. So your mum is working as a professional healthcare, in this case, she would be able to prescribe you the estrogen. Yes, sooner is better than late. However, you are still young, are you sure that you are not a crossdresser, but transgender girl. Taking hormone may lead to permanent effect e.g growth of boobs, reduction size of male organ including penny and testicle, soft skin, etc. Perhaps, you can talk to your mum and see what she can help. Are you always jealous some pretty females? are you interested in make-up?