idk about OCaml but if you find learning Haskell slow I highly recommend learning Erlang. It's similar to Haskell in some way but 10x simpler and highly practical. Probably the most practical language/framework (OTP) I've ever come across outside of maybe Ruby/Rails.

By 'practical' I mean in terms of starting out new -> launching a production-worthy business application in an efficient time window.

My problem with Haskell is that I spend all of my time trying to build perfect software instead of productively pumping out software. This is why I prefer Erlang, despite the fact Haskell is a superior language in many ways.