I'm taking the linear algebra course on code academy.

https://www.codecademy.com/courses/learn-linear-algebra/

There are a bunch of options for linear algebra courses out there. It depends on where you are coming from. A lot of this is still Greek to me as well, but the more I study the more a few terms start to click. Good luck.

I found 3b1b's series on the "Essence of Linear Algebra" [0] super valuable

[0] https://www.youtube.com/watch?v=fNk_zzaMoSs&list=PLZHQObOWTQ...

Usually, this is taught in first year linear algebra courses for any kind of engineering (or natural sciences) degree