Just remember
you will be going to your flying school more than 13 times, probably more like 26. Things never turn out the way you want them to in training, there'll be a bunch of reasons, not the least of which will be weather. It can get very frustrating not being able to do anything else until the day and when the weather is marginal you end up at the school anyway which may well turn out to be 2 hours of wasted driving.
Most of the schools will give you good training but you have an excellent PPL club on your doorstep at Prestwick, availability might be irritating but on the days when you can't get to fly, at least you'll be close enough to do something else.
Just an observation
Email Prestwick flying club, go see them and take a lesson.