Don't think. Thinking is the enemy of creativity. It's self-conscious and anything self-concious is lousy. You can't try to do things. You simply must do things.
To me, fearless is not the absence of fear. It's not being completely unafraid. To me, fearless is having fears. Fearless is having doubts. Lots of them. To me, fearless is living in spite of those things, every single day.