Although I'm not a Microsoft fan, their docs for F# are worlds ahead of anything I've seen for OCaml (I know a few OCaml folks are working to fix this).
I've considered trying it for Advent of Code this year.
I've considered trying it for Advent of Code this year.
(also: generally speaking the "core" of .NET is quite unlike most other products Microsoft puts out, so chances are you will be pleasantly surprised)