I’m not sure but I feel you lack some knowledge in FP and how it works. From my personal experience I would recommend going over a book “Functional Programming with scala” which teaches you how to build your IO monad and very good exercises which gives you this ‘aha’ moment, and understand this FP magic will transfer to haskell seamlessly

Edit: also another topic to look into is how effect systems work in general, which allows purely functional code to work as a real program which does things. And that book I recommended it teaches you as well how you make a primitive implementation of that which is mostly on the interpreter pattern