Experience replaces some opinions with questions.

Certainty gets expensive after you have been confidently wrong a few times. What replaces it is not confusion but a set of better questions: what would I need to know, what is it like from their side, what am I assuming. Opinions harden early and soften if you are paying attention.

Take one thing you feel strongly about and try to state what would change your mind. If nothing would, that is not a belief you arrived at by thinking. The question is more useful than any answer you currently hold.