How flattering; I've now done so. Also, I very much like your approach to learning math by grounding it in concrete subjects. Many people say they learned calculus best by learning it alongside physics, since calculus appears much more concrete when you look at the velocity and arc of, say, a fired cannonball.

Finally, here's an excellent article from Barbara Oakley, who learned math starting about age 26 after getting out of the Army. She's now an engineering prof, and teaches a MOOC called "Learning How to Learn" (I have not taken it, but I have reviewed the topics, and it appears to hit all the correct points): http://nautil.us/issue/17/big-bangs/how-i-rewired-my-brain-to-become-fluent-in-math-rd