In response to the original post, GET A GRIP.
What do you want to be? Regardless of whether you believe you can achieve it or not - KNOW what you want to be. KNOW what you want to do. Be true to your heart. And then start swimming. Yeah, swim.
They say shoot for the moon, as if it is simply a matter of pulling a trigger then crossing your fingers. No. You swim. Every day. Every hour. Every minute. One day, you'll run out of gas, and even if you're not on the moon by then, you will be among the stars.
But it all starts in your heart. Know yourself. Know yourself.