I learnt Scala before diving deeper into FP, but I think properly learning/understanding Monads and some other FP concepts greatly help every sort of programming I do (even though it is mostly OOP nowadays). You come to notice it everywhere and even if you can’t abstract over them (there is no one `bind` or `join` function, so it may be called different with each Monad instance), but after understanding them you will gain a better reasoning power over them.