lots of questions!
you ask a lot of really good questions, and it's fun to help. And once again, Zach answers correctly. But, if I take a step back and look at what you've been 'saying' about yourself with all your questions it's that you're not totally satisfied with yourself (or at least, certain parts of yourself), so you're anxious and you want to change them, maybe to stop the anxiety?
If that sounds about right (or sorta about right), might I suggest that you hold off and just wait awhile, eventhough that might be hard for you. Things change so much during puberty that by just waiting I think you'll get to where you want to be. without any dramatic, permanent (or potentially harmful) effects.