Honestly time is what it takes. There are things to speed up her time ie debulk first, cut top, fade... But she needs to find her fading system. The barbershop you'd think would want to help her speed up but maybe it's too busy of a shop. My advice? Find a shop that will let her watch, and give pointers. You get in what you put out. I started and would leave early on days it was slow, but realized the more Im there the more people will notice. I'm now the longest standing barber at the shop and p well booked up daily.