Comment by vaughnegut

I went back to school for CS, and ended up taking courses starting at Grade 10 math as prereqs so that I could rebuild my math knowledge. Even the start of that was rough, since I hadn't done math in a long, long time. By the end of the course, I was much stronger.

What I'm trying to say is that you've made a good decision by jumping way back. Once thing I realized pretty quickly is that to do well in math, you need to know the prior content pretty well. And for the next thing, the current content pretty. And so on. If you can stay on top of it, it 's a lot less challenging (and more interesting).