I’ve tried to learn Spanish, and would love to get to that point, but I really wonder if I’d be able to enjoy reading for leisure in another language, or if it would feel like a chore.

It's a pain at first, don't get me wrong, but if you start with a decent amount of knowledge you should be fine. Definitely not something to do before you have confidence in your command of the language, though.

Source: Learning Japanese, been there.