It took me about 12-13 months in total to gain my licence. I even took a nice break in the middle for winter and I seem to recall last summer being pretty rubbish for flying (well, for learning at least). If you can, try to fly during the week, because the weekends tend to be very busy; it's easier to get longer slots with your instructor in the week, meaning you can hopefully spend a bit more time on the ground before and after the lesson. This proves to be quite valuable