It took me about 5 years, and from what I remember, 8 attempts, to get it, so I only got it in my early 20s. Been driving for over 6 years now with no problems. I think it also depends on where you live and what other priorities you have. If you're at uni, like I was, you might have no need for a car as you live right there on the campus, and so you might not get much chance to practice driving in those years.