How can I become beautiful?

Pure, radiant, simple, natural... That's what I think beauty is and that's how I want to be. I know that beauty comes from within and all, but that doesn't work for me. I think I have a good personality, like I really care for people and I'm a kind sort of person... But I still look ugly. I know it shouldn't matter about how you look and that beauty is only skin deep, but still, I want to be able to look in the mirror and see a beautiful face. So how do I be physically beautiful? This doesn't mean fake tans and caked on makeup, by the way...