Sharing Our Innermost Thoughts

Any doctor or gym trainer here?
I am 17 and barely got any chest size. Girls of my age got such a goodd cleverage. I feel jealous. I want them. Okay, i am ready to accept that i am insecure ant my body. But this is how it’s going. I hv to wear padded bra jst to hv some. This all is jst bc, of the genes i got, but then again it’s my mother who don’t let me wear those very cute clothes jst bcz of this cup size. It makes me feel nthng, as if i m rspnbl for all this.
Now i am thnkng of joining gym. Will that work?
Or any othr suggestions i could work upon?