Try writing easy programs in it.
You can find sample tasks in various textbooks, probably.
I wouldn't recommend sticking to Haskell/FP textbooks, just try to do simple things with it: calculations, string manipulations, file access.
After I solved a dozen, I've broke the ice :)
After that, read a lot on advanced concepts (Monads, Arrows, IO, recursive data structures), because haskell is infinite and there are a lot of them.
