So Bob and Daniel sit down in Bob's kitchen and start to fiddle around with F#. Daniel begins with a little lecture about the wonders of F# and functional programming. Then Bob gets all pragmatic and says: Let's do the Bowling Game Kata.
And then these two old programmers wander and stumble all over the place getting this simple little program to work. They write their tests, and make them pass, using the TDD discipline.
And then a miracle happened. You learned something.