Well TikTok actually has a pretty good algo (At least awhile ago, it might have become enshittified since) once you use it enough to train it beyond the default new profile feed.
When I was on it, I had gotten the algo to spit out mostly cool educational stuff. Like chemical fun, space stuff, Hank Green stuff, technical things (Like programming tips, cybersecurity, homelab etc) and other nerdy things (Like Star Trek stuffs) with a bit of memes sprinkled in
I don’t agree with the other commenters about books, I see what you’re asking for at least, books are more for when you want to dive more in depth in a specific topic