The answer is simple. Be who you want to be. unless your talking stupid shit like you want to be a dinosaur or something on the ridiculous side of things. Then what is honestly stopping you? Fear is what stops you from making changes in yourself that you feel you want to make. Now then to answer the next question. What is you are afraid of? Why aren't you working to confront that fear? One of the best ways in life to gain self knowledge is to gain self confidence. The best way I know to do that. Work on yourself to overcome the things you fear!