“Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.” ~ Richard Feynman
Don’t confuse general knowledge with deep insight. Having a great memory can help you ace an exam, but that doesn’t make you a great thinker. Memorization isn’t the same as understanding.
There’s no better way to learn than by learning the things you’re most interested in, and doing it in ways that feel most natural to you. What interests you the most is what you’ll remember the easiest and understand the best.