[laxatives]

On a related note, Mary Boas's text, Mathematical Methods in the Physical Sciences does a great job of giving you the necessary bag of tricks to learn all of undergraduate level physics (and probably much more) without diving too deep into any single topic. It should be sufficient to give you lots of intuition until you decide to pursue something at much greater depth (although doing that alone, and without a professor/PI/expert of some sort is realistically, almost definitely a waste of effort).