Surprise yourself extraordinarily.
Doubt has ruined more dreams more than failure ever has and would. When one fails, it is easy to get up, but when one doubts, it is difficult to break free.
Instead of being afraid to fall, why not test your courage and see if you can learn to fly? You will never know what is out there until you spread your wings. You will never find out what you can do until you actually try.
Greet the world with enthusiasm. Even if you fall, the view on your way down will surely make your landfall an extraordinary one.