Find people you trust or people who truly understand what you’re doing.
Or people who are actually doing what you’re doing.
Ask them for feedback. “What can you say about my work? How can I improve it? What should I avoid doing?”
Then reassess. And Improve. Keep improving until you become confident with it.
The good news is you can now contact those people through their blogs or emails (or even social media).
You are lucky. This is impossible 50 years ago. So take advantage of it.
The goal is to get the right feedback. And get as many as possible.
The right feedback exposes you to the different aspects of your work you could have never figured out your own. And if you listen carefully and accept your flaws and take the right action, you will be unbeatable.
That’s how you grow.