I'm thinking of moving into functional programming. I'm deciding between F# and Haskell. I don't like that both have indentation as syntax, but that's neither here nor there.

I know the .net core stdlib like the back of my hand. I'm trying to decide - and, as the purpose of this post, trying to ask the community - if this is a *bad* thing when trying to learn a new programming paradigm.

In other words, I think I want to try Haskell because I won't be able to lean on my knowledge of the standard library. I'll be forced to actually understand the language and learn functional concepts, instead of trying to bring my OOP knowledge over from C#.

Additionally, the .net stdlib is obviously built in a OOP design, so I'm afraid that the F# stdlib might suffer from that too.

But I'm still thinking that maybe my knowledge of the .net stdlib will be more helpful than harmful? Like, yes, I'll be using it as a crutch but at least I won't be trying to learn three things at a time (stdlib, syntax, and paradigm) and can focus solely on the syntax and paradigm.

Anyone have any insight into this problem, or maybe some wild guesses?