How long is a piece of string?
Everyone is different. The DSA survey says the average pass (does not include failed attempts) has had 50-55 hours PROFESSIONAL tuition. This does not include private practice. However, this includes good and bad instructors.  You should estimate taking 1.5 x your age - it maybe more, it maybe less. Some people pass after 12 hours, some need up to 60hrs.

Practice. The key to learning any practical skill is practice!
The more practice you can manage the better you will become.

Learning to drive is not about controlling the car, it is about reading the road, reacting to your environment and planning ahead. This takes time to develop. However, there are things you can do to speed up your learning.

a) EVERY lesson should be used as a practice for the test.

b) Have 2 hour lessons. Even if they are half as often. 2 hours gives you time to learn, work through problems and develop your skills.

c) Find a tutor you get on with and trust, a good teacher will be happy  to give references. Avoid any that "guarantee" you a pass in 10 hours!

d) Book your theory test. There is at least a three to four week waiting time. There are DVDs available with all the test questions and clips to practice the hazard perception part. You can also find links below. Study. Set goals. It costs £30 to take the test. Don’t waste it.

e) Talk to your tutor about a schedule and try and stick to it. Be realistic about the time YOU will need to become ready for a test. Many local centres have a booking delay of 8 to 14 weeks.

Book your test. www.direct.gov.uk/drivingtest

Lots more- www.driving-test-success.com