If you never doubt yourself and your conclusions, then you could never change your mind. And geez, I have changed my mind on various topics more times than I’d care to admit. The type of thinking that is actually dangerous is the opposite of what you do. That is, well how most people stop at the first peak of the Dunning-Kreuger effect:
It kind of sounds like you jumped out of the gate on many topics with great zeal, learning an awful lot, was really excited about many topics, then hit the step right after that. My encouragement is to keep your chin up and keep asking questions and learning.