I find the math and all the integral signs intimidating. Is there a course that will help me learn all the background material to understand these things better?
For probability, I really like Morin's book [2]. It starts really basic (like, super basic), but builds up a coherent understanding of lots of useful distributions, where their density functions come from.
[1] https://press.princeton.edu/books/paperback/9780691130880/th...