There is really nothing like experience.
One of my favorite quotes of all time is by Michael Jordan.
"I have failed over and over again in my life and that is why I succeed."
He learned to fail forward. The mistakes he made as a basketball player or in business taught him valuable lessons. He chose to turn those lessons into new learning. He took time to reflect on his experiences and how he could improve himself toward greater success.
Often times young people who fail at something tend to develop a fear of failing especially if it's a similar task or situation they have failed at before. When there is a fear of failure, the tendency is to either not try again at all or give a half-hearted effort so the excuse becomes "I really didn't try." It's a self-fulfilling prophecy.
When your mindset shifts to failing forward, you develop the courage to move past the failure by focusing on what you learned from the experience. Your reflection on your past mistakes or failures is key to establishing your next steps and overcoming your fear.