Curious what method you used? I recently bought a book, I'm only learning it to port a Haskell project to C++, if I can even do that.

I have read http://learnyouahaskell.com/chapters and then start implementing something useful based on examples. This process read book x and then implement something has worked with all other languages. I think big part is that Haskell has all kinda custom operators which are basically ungooglable.

https://hoogle.haskell.org/ can be helpful for this

Most people require several attempts before they get over the hump