Well funnily enough I started back at what a matrix really is. What does it mean to multiply them, add them, invert them and so on. The first good resource I us

Well funnily enough I started back at what a matrix really is. What does it mean to multiply them, add them, invert them and so on. The first good resource I used was Better Explained! I also took out some Linear Algebra text books from the library. First was Linear Algebra for Dummies (don't knock it!) and then an undergraduate text book. I've still a ways to go but it was a good start.