Start educating them on what internet is and how it works early, before they even get to use it. Allow them to observe how you use it. Explain the good and the bad it can provide. I feel like a lot of how you should use the internet is just how you should generally live your life - stranger = danger, don’t give your personal information to anyone at all (even if they claim to be me/my friend/police/whatever), understand how content engagement works and who benefits from it (ads and manipulation are everywhere, not just online), and so on. Ngl I’m kinda baffled how we navigated a much more dangerous real world “just fine” up until the internet has apparently become some unfathomable evil. By not allowing your kids to learn early, you are just gimping their future, they will have to go up against people who often literally don’t know a life without the digital world. Not to mention - if you don’t teach them the basics of understanding how to navigate the world and its dangers, they can get hurt whether the internet still even exists.

My one opinion that might be controversial is that I believe that by enforcing arbitrary blocklists (outside of just generally useful stuff like uBlock Origin) and restricting content without explaining and demonstrating anything you are simply conditioning your kids to be ok with surveillance and censorship.