I have seen talented people drag their feet and cause delays simply because they become frozen with fear at certain moments. We all have these moments. I take a deep breath and say to myself: whatever happens this is part of the process. I have to go through this to get to that.
Stumbling, bumbling, embarrassment and failure teaches us what not to do, which is a more valuable lesson than the ones we learn when everything goes right. Take the leap. Succeed or fail. Celebrate or lick your wounds and recover fast!