Need advise !

Hey guys, I'm a 16 ur old girl & I'm really trying to make my dreams come true. It might sound corny but I want to be a singer. I love singing & listening to different kinds of music. I wrote down on a piece of paper everything that I need to do and how I will do it. The only problem is that my shyness is holding me back. When I was growing up I was diagnosed with this skin disease called vitiligo. I was always made fun of and people would constantly stare. My self essteem is really low . Any advise on how I can come over that? :/