Advice needed for Choker Fan

I cannot transfer the momentum from a fan to the middle-thumb spin. I can do the Will Hirsch variation as shown in the beginning and the ending with the middle-ring fingers. However, the beginning spin is really hard. I'm also going slow to show what I've been doing to substitute the beginning portion. If anything, I can do an awkward turn the bali around and into the ending choker. Any advice?