Have you ever thought that the reason you are afraid to try is that you will exceed far beyond your expectations?
We have been conditioned to do the bare minimum and accept that. Start believing in your power and your untapped potential. FYI, scientists only understand the functions of 5% of the human genome and are able to do so much already (vaccines, transplants etc). Just imagine if they understood more. So take the time to understand yourself and the growth you have experienced so far and go create the magic you were intended to do.