Just start. Use whatever style you are used to. Use controllers. Adapt your style as F# pulls you deeper inside the pit of success. You'll struggle the first couple of features, but you'll reach a sweet spot between your current style and functions relatively fast.
I suspect you're right. I just have to get over the hump of being uncomfortable/fumbling my way through things that I would otherwise know how to do in C#. Thanks!
"pit of success" from the previous comment might refer to this video, which is long but good especially to adjust to a different mindset