What if I fail?
So what? No one is actually bothered if you fail. Yes, there might be a few guffaws and some smart jokes about how you failed and stuff but why are you bothered?
The ability to convince your mind to get up from the lazy chair and attempt something that made you explore an uncharted territory is commendable. You should be proud of yourself and keep going at it till you win.
It is okay to fail but not okay to lay back. Get up and take charge. Make sure your next attempt is one step closer to success. Measure your steps and see how you can achieve this and move ahead.