For another approach at teaching math in an accessible (and self-teaching friendly) approach, I can’t recommend Jay Cummings enough. I recently tried to go for

For another approach at teaching math in an accessible (and self-teaching friendly) approach, I can’t recommend Jay Cummings enough. I recently tried to go for a math degree in my free time using my countries’ remote learning option, and even though the attempt didn’t last long because the format is hopelessly broken (Mediterranean bureaucracy), I’m still engaging in self learning through his books and they’re an absolute goldmine. Most basic math books assume no knowledge of the subject but a familiarity with general math that is unreasonable - it’s like saying you don’t need to know what a deadlift is but you need a back that resists 200kg… It’s a borderline fictional audience in practice. Cummings manages to understand the novice far, far better.