For those who mentioned/wondered about my day job / income, I work a "humble" warehouse job at a university bookstore, so I get to work with textbooks and general books regularly (though not all the time). This was how I got exposed to all these subjects! The pay isn't the greatest, but the university has great employment benefits and security.
And an interesting backstory: I actually started working here as a part-time seasonal cashier after dropping out of grad school and had to find something "random" to pay some bills. After a couple of seasons and no luck finding a "real job", my supervisor suggested that I apply for the warehouse opening. I was aversive to the idea, because I never would've imagined working a seemingly "lowly" warehouse job, especially as a "university grad". I applied anyway because I had no luck elsewhere, and I've stayed here ever since!
Honest to god, if I didn't work here, I would've stayed in the sciences with my head in the sand, clueless about other disciplines, clueless about the world.
Gonna quote one of the comments here: "The universe has a strange way of putting the pieces together... It will make sense looking back on it." https://news.ycombinator.com/item?id=30928282
PS I love that you folks are actually thinking about this constructively. I'm blown away, can't thank you all enough!