The integrated course at OAA now gives you a degree at the end of the training.
PPL flying is not a problem, wether you have completed training or not as you will have to go through all the training again, so why waste cash.
You will have to undertake the 2 day selection, and should you pass that you can join a course.
Selection is only valid for 1 year so from the time you complete selection, you have 1 year from that date to start the course.