Yes, I was afraid of driving here, so I didn't drive here for the first 5 years I was here. I am still not entirely comfortable with it, but I don't really get that much practice, tbh. We don't really need to drive that much & so we don't - we walk or use public transport for the majority of our travel.
Yep, I don't really get a lot of practice, either, though I'm hoping to do some more driving in the near future. I've taken to ordering my groceries online lately since I can find more stuff at Tesco online than in my local shops, but that pretty much rules out much driving for me since we only work a mile from home.
I was probably in the same frame of mind as you, Mander, and it took me 19 hours. I did my lessons in 90 minute blocks, though, instead of one hour blocks, and the 19 hours included the test, so it really wasn't very many lessons in total, about 11 lessons and then the test (which you have to pay for as a lesson since usually your instructor will take you out to warm up and practice just before the test, and then they wait for you while you take the test). It took me about 4 months from the time I sent off my provisional licence to the time I passed my test, including the theory exam and all of that. The main thing is learning the manouevres they test you on here, like reversing around the corner, turn in the road, parallel park, etc., and the examiners are pretty nit picky about some things. I think most of us had to break some habit (coasting or hand over hand steering, etc.) and that can take a little time to get right.
I'd recommend buying the Driving Test Success CD-Rom to start going over your theory test stuff. I started doing that before my lessons, and it helped to already know the signs and basic rules of the road before my first lesson. But you certainly don't have to. I just think it might make things go a bit faster in your lessons if your instructor doesn't have to spend too much time going over that stuff with you. You'll need to pass that test before your practical exam, so it's good to get going on that and set your test date when you first start lessons.
Good luck!