we had a car (Eagle Summit/Mitsubishi Mirage) with a tough kind of clutch. I took both of my sons out innumerable times to a large parking lot to practice shifting gears. They never got it. Neither one of them, and they were both motivated and are both mechanically inclined and coordinated. One day we borrowed my mother's car (the Honda Civic that I ended up buying and driving for 11 years) and I let my older son drive it. he picked up instantly and drove it like a pro, even double shifting once.
Both of them drive std transmission cars now - with pride.

Good luck with your daughter and your car.... (we replaced the clutch in the Eagle Summit too because of them.. )