Mathematics for Self-Study is a series of books geared to self-taught students who want to learn the main ideas in the Mathematics field without the aid of a professor. Although focused on the theory (which I like), the books try to introduce the themes from a practical and intuitive standpoint.
Resources
https://www.librarything.com/nseries/62135/Mathematics-for-Self-Study
https://archive.org/details/mathematicsforse0000unse_q7g0/page/n5/mode/2up
https://archive.org/details/j.e.thompsoncalculusforthepracticalman/page/n1/mode/2up