I was a college math major. Category theory wasn't one of the offered courses at my college, so I didn't study it specifically. But I didn't get through any of my math classes without working the problems and proofs, and without having a teacher to help guide me through the material. It can't be read like a book. At least that's my experience.
And as I get older, being interested in the topic helps more and more.
And as I get older, being interested in the topic helps more and more.