I am a boy and i want to be a woman at 16 ?

I am a 16 year old boy, have a reputation for bieng very masculine, and yes I am straight, but I fantasies about being a woman or transgender, I love wearing woman's.clothing including make up, panties, bras, and dresses, I consider myself lesbian. I want to become a woman, how do I get started? I don't plan on telling anyone. I want large breasts and I want to be considered a woman. But I know I won't be accepted, help? Sincerely, miss josh<3