On the other hand, you're not going to get this experience from "Rich Dad, Poor Dad" or whatever, and if you haven't built these muscles you probably shouldn't be starting with Gulliver's Travels or Walter Ong or some other really challenging thing.
First of all, throw out your self help books and just read Thinking Fast and Slow, which 80% of self-help books have ripped off for the past 20 years. It's more boringer (I have a PhD so I can say things like that), but it at least isn't just a bunch of cute anecdotes for an executive to amuse themselves with while there's no wifi on a plane.
Second, start building those muscles with the few people who are both challenging and accessible. George Orwell is great for this, read Homage to Catalonia and get a collection of his essays. Read a few Beckett plays, try Endgame and scratch your head at that shit. Read some Neil Postman and be like, yeah, he was right about technology.
The idea with books isn't to make yourself know more stuff, though that does happen to some extent. The idea is to improve your character and model the world better. You're increasing WIS, not INT. If you're feeling impatience when you pick up a book, if you get that feeling after three pages that you need to put it down and move on to reading 40 news sites, that's your weak-ass WIS. It basically means your brain is flabby. You're like the person at the gym who hasn't been in 4 years. Just push through, give it a week or two and you won't have that feeling.
P.S. People, stop calling things "content." "Content" is what you put the ads around. Goddamn civilizational collapse.