I've recently been going through a similar experience teaching my wife how to use a clutch. However, I'm teaching her on my Fourtrax 300ex. Learning a clutch on an ATV is much easier than a bike, fewer things to manage at the same time. I also find learning on softer soil (e.g. sand) helps ( perhaps not on a bike though...) If they dump the clutch its less likely they'll get thrown or spooked. Its also easier on the clutch.
Once she masters the clutch on the ex we can move on to bikes.
I need an excuse to buy another Lifan.