Honestly, probably two weekends of Elm give you such a head start in learning Haskell. (https://www.elm-tutorial.org/en/)

You can get through the Elm tutorial in about a day. And the rest, is just playing around with the language in a trivial app.

Two weekends of Elm, followed by the the UPenn Spring '13 Haskell course are the smoothest Haskell learning plan I've seen.