Look we live in the real world and the forecast, is partly scary. with a chance of rejection.
I know it's popular to say you should have self-esteem and self-confidence and brightly go forth in the world.
However, I am telling you is that it is OK to be afraid. Perhaps it is OK a little fear is probably good for you!
The simple reason is FEAR leads to over-preparation. When you over-prepare, ACTUAL failure becomes a much more remote possibility.
In fact, having fear, and then, proceeding in spite of it, is where REAL confidence comes from. It's the accumulation of experiences in your life in which you overcome your fear and try something even if you really do fail at it! that leads to authentic self-esteem.