I highly recommend spending a little time trying to understand the basics. You might find “Functors, Applicatives, and Monads in Pictures” helpful: http://adit.io/posts/2013-04-17-functors,_applicatives,_and_...

Type classes, functors, and monads are assumed knowledge in most documentation, as they are foundational concepts in Haskell. Just like math, you must know addition, subtraction, multiplication when learning algebra.