I moved to an older, partially-decaying, partially-gentrifying U.S. city and wanted to learn all about its history. What happened to all these crumbling old buildings? Why are certain areas blighted? Where did all the old ethnic communities go?
Back in 2008, shortly after I started earning money and investing in the stock market, the market crashed. So I went a long reading project trying to figure out what causes booms and busts, bubbles and crashes.
Then there are all sorts of political questions in the world. What drives terrorism? Who is right or wrong about policy argument X?
There are endless historical arguments. Why did the Roman Empire fall? Were the American colonists really right to rebel from the British, or is that just winner's history? Where did our modern customs and mores come from?
I've gone down other reading rabbit holes with other life knowledge areas - dating & relationships, management, startups, etc.
If there are certain areas that pique your interest, perhaps myself or someone else could make you a reading list that will break you out of your filter bubble. I've certainly come across a lot unorthodox material that is both edgy, novel, and more true than not. But it is hard to give you advice if you don't know what you want to learn about.