I tried learning Haskell by reading LYAH and doing some of the cis194 course, it was alright, but I was struggling. Then I bought Haskellbook (Haskell Programming from first principles). Took me a while to finish it, but I had a great time doing it. I learned Haskell and was able to jump right into writing my first library with it. And I come from a non-CS background with only a bit of Ruby prior to that. The quality of your learning materials matters a lot.