OP, this is certainly advice, but I would like you to consider whether you want to take advice from someone who uses the phrase "dangling from your nutsack in no time" unironically.

> Your main problem is confidence.

Oh, I have confidence alright. I’m confident I can single-handedly cause a sev at work. Jokes aside, I think I know where I stand compared to my peers skills-wise. I try to make up for it in other ways though, and it hasn’t been a problem for my employer so far.