Won't let me post without a topic

So I am currently reading Chapter I of Toposes, Triples and Theories (http://www.case.edu/artsci/math/wells/pub/pdf/ttt.pdf) to gain some basic understanding of category theory. I'm advancing at a pace of one page an hour. Shit is fucking derp. If I get to the end of the chapter, a feat I am not really sure of being capable to accomplish yet, am I ready enough to start getting into the world of Haskell for Dummies?

>>3
The author assumes you know set-theoretic and topological definitions and constructions well. If you don't, you will be checking Wikipedia for definitions all the time.

Constructions may also have duals. For example, the dual to the category of objects over A is the category of objects under A. An object is an arrow from A and an arrow from the object f:A→B to the object g:A→C is an arrow h from B to C for which h  f = g.

I think I just spent 5 to 10 minutes deciphering that sentence.