FTM Transitioning?

I'm pretty up in the air about all this right now but I feel like I need to make a choice pretty soon. I am a genetic female who has lived as a butch since about the age of 12. I don't suppose I've ever had an issue with being "female" and being called "SHE"...what bothers me is the feminine physical features I have. I want a straight and masculine figure. Not this huge chest, not these curves. I purchased a prosthetic which I can also urinate through (standing up) to see what the was like. I find myself wearing the "packer" at home all the time and out of the house, it makes me feel better about myself knowing I can just whip it out and piss like a man. I want top surgery so bad. My chest is very big and I'm somewhat overweight. I am also taking herbal supplements to increase testosterone levels. I don't want to go on "T" for two reasons...I am concerned about the side effects and I am also concerned about how this will affect my career and parents. Any advice?