If you want to master the monad, try the Monad Challenges.
It just "naturally" plays around with the language using very simple concepts, and at the same time showing the simplicity and expressiveness of working with those concepts that would be hard in other languages.
It's a bit of an old book by now, so it covers an older subset of the language (and maybe some very few syntactic details might be different, but I don't think it should impede anything), but for starting out you don't want to go too "wide" anyway.
Especially easy to setup if you're using VSCode. Lots of Haskell code forgoes type annotations so with this plugin you can simply hover your mouse over things to see the exact type the compiler inferred.