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InfluxDB
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You don't need a course to know if you're into Haskell. You can just check out LYAH to get started with and then use the Haskell wiki (which is very well-written, IMO) for specific stuff; it's pretty much exactly what you do to get started in Python or JS. Mind you, you probably won't get far taking on Haskell as your first programming language; you'll have to have a good intuition of important concepts like recursion, combinatorial data structures (linked lists, trees, graphs), and OOP (which is much easier in the beginning).
You can also read the Plutus book based on the 3rd cohort of the pioneer program which extends it a bit and adds some extra explanation.