One of the great things about moving to Silicon Valley is that you're surrounded by all these people who've done it before. This place is an assembly line that takes a couple of twenty-somethings and walks you through everything you need to learn.
A lot of really great, innovative things have happened when people just didn't know it wasn't supposed to be possible.
You're not going to become a great manager overnight. You're not going to become a great public speaker or figure out how to raise money. These are the things you want to start the clock on as early as possible.