I don't believe in finding yourself and your true motivation/purpose. There's nothing to find. Whatever you're doing is where your self is. And then when you do something else, your self is there. Whatever you want to do, do that because you'll be better at it than you would if you weren't really interested. Then when you're no longer interested in that, do something else.
Lucky for you, you're an ENTP, so you'll be good at nearly anything you want to do. Not everyone has it so easy.