Do this. Forget the lessons entirely until you are driving around (with her) without even thinking about it, like a normal driver would do. Make sure you always drive when you need to go anywhere which doesnt need to involve a motorway.
Then get a couple of lessons once driving is a non issue to you as i did. All they need to teach you then is how to present your driving to the examiner which will take a few lessons at most.
Ok cool. Sounds like a plan.
Just to be clear, it is legal for me to drive her car on a provisional with L plates aslong as she is present?