or knuckle roll...
Started teaching myself this yesterday. I'm fascinated to see how long it takes for me to get smooth. I'm very slow with many drops at the pinkie thumb transfer. I'm trying to float the coin on my thumb not run it under my fingers at the transfer. Maybe I need to just get smooth with the first regular digits and then focus on the pinkie/thumb part. I have tiny hands, but they're strong and dexterous, so I don't think size will matter here.
Shuffling cards is a whole other matter. I have a difficult time holding cards and often have to adjust for grip. That's frustrating, but children learn card shuffling, so it's just a matter of adjusting grip and expectations and not giving up.
Plus, I keep finding humor in all my fails--so that's good. I'm actively amused by myself.