Do you have any recommendations for effective self-learning paths? I have murky old foundations in all three fields (took first year linear algebra and a variety of logic courses) so am not starting from nothing but the few times I’ve tried to jump back in I always get a bit bogged down and can’t keep with it.
Gilbert Strang has an excellent free (IIRC) linear algebra course, accompanied by his excellent textbook. Kahn Academy has some surprisingly good linear algebra lectures as well, if something isn't clicking.