I love the aesthetics of Mathematics, especuly the side of it is that lays the groundworks for Philosophy, and I want to learn a deeper Uni-level understanding of it and its concepts but I'm not sure how useful it would be if I don't have a degree anywhere close to it (I'm a History major). How useful is learning Math if it's not going to be a marketable skill due to how it is self-taught through non-Uni resources?