Such a wonderful and interesting topic by @javybar
So practice: Push past your discomfort, growing your discomfort method. Put yourself out there, and be OK with not knowing if people will accept you. Stick to a habit, not listening to the negative self-talk that normally holds you back.

to have confidence in the truth, the existence, or the reliability of something, although without absolute proof that one is right in doing so: Only if one believes in something can one act purposefully. verb (used with object), believed, believing.
Learning Means Believing in Yourself. ... Believing in you is another foundational component of learning. If you don't believe in yourself, it's hard to grow and learn. Like knowledge, confidence can't be transferred. The person that needs to believe in you, is you.

Forgive yourself for past mistakes. Before you can start to trust yourself again, you have to go over all your past failures, and the bad feelings you have of them. Just take 10-20 minutes today to do that. Yes, you failed.

Nicely done sir...