The reason you might be complaining about imposter syndrome might be the fact that you do not take yourself seriously. You’re only doing it for the money. You are afraid of other people laughing at you. You’re pretending to be something or someone you’re not just because you want the money that comes from behind that.

Take yourself seriously. Educate yourself (I’m not talking about college here). Build yourself and your knowledge. Build your mind, before you build your personal brand.
Don’t believe in yourself.
Make it a fact of nature that you’ve developed yourself enough to be worth listening or paying attention to.