Epistemology is probably the only topic that I would recommend being 30+ before you read. Before that, in my opinion most folks aren't ready for it. You need to both accept ultimate uncertainty and also deliberately create your own certainty in your life. That's a tough ask even for many older people.
I've come to believe that an important part of any society is creating a series of positive narrative myths that are increasingly-detailed and nuanced. Why positive? Because introducing negativity in any form early in the education process turns the kids off to receiving anything more on that topic or from that viewpoint. We need optimistic learners, not pessimistic curmudgeons.
So yeah, we're going to lie to you about the number line. We're going to lie to you about history. We're going to lie to you about damned near everything, and a simple search online will prove the lie. But we lie in order to encourage you to rebel, not to indoctrinate. Find the problems and fix them. It's not our business to tell you what they are. Hell, we don't know ourselves. We're in the same boat you are.
This is not a declarative, literal topic. Already comments here decry the big words. So while I agree with you, epistemology is just like any other intellectual super-power: you gotta be able to deal with the repercussions or you shouldn't dive in. The water's deep.
You lose all of that googling around for Wikipedia articles. Long-form books are the only way forward, along with the confidence and intellectual curiosity needed to eventually make a difference.