This is huge!
I completely agree of course. I do a lot of training that scares me... and I find my fear holds me back all the time, even with things I know I can logically do. I really want to spend more time doing things that scare me just so I can be so much better at doing things that scare me.
I know what you mean. Its the fear that holds us back for sure but the more you face it, the more you'll get use to it. You can do it!