Hope the flying school i choose doesn't have people like you in it.
Welcome to Pprune.
Try Prestwick first. If you work in Kilwinning, that would be your easiest commute. When learning to fly there are several factors to consider-
Your availability
Aircraft availability
Instructor availability
Weather
Your budget
Your specific times when you can and cannot go
All can conspire to make the task, a challenge. A local school is preferable, within say 30 minutes travel time. Also the weather can be very local also. If you are fairly near to your chosen airfield/club, it can cut down on wasted ground time.
Good luck.