Abbey, I was once told that you need as many lessons as your age.
I was 20yrs old when I learnt to drive and had 20 lessons.
I also practised in between lessons with my brother.
We used to go to an area where mass demolition had taken place, so no houses, traffic etc just roads and that is where I learned to reverse round corners, 3-point turns and parallel parking.
When I had cracked it, I went on the main roads.
Can I just say, you really need to get as much practice as you can in between your lessons, I hope you are able to do that.
Good luck, I hope you persevere with it.