You can absolutely get estrogen at this age, if you go to the right doctor. For instance, Jo Olson in Los Angeles, Maddie Deutch in San Francisco, and my doctor, among others will give you the ever essential puberty with your peers. Blockers alone these days, at least stateside, is outdated medicine at best. Wish I could say the same of England and the Tavistock clinic.
If you are French, as you allude English isn't your first language, it is a terribly difficult place to be for transsexual youth. The doctors and higher ups believe anything can change before 18, and the methods to getting hormones before then are quite complicated. While I'm not a French resident, this is the treament I dealt with in (a very liberal part!) the States, just a few years back when I was a teen-and because of so much doctor ignorance, I started at the an age too late for my liking; 20. It sucked hard.