I don't think you'll have any major problems. Loads of people, probably most, do their flying whenever their jobs and other commitments allow... I did my training weekends and weekday evenings, which worked out just fine. Assuming you're one of us lucky guys who get the PPL just to fly for fun, you will "have to"
work your flying into your lifestyle once you have your PPL anyway, so might as well get used to it from the beginning!
During my training, it was striking how people with flexible and irregular working schedules had a much easier time finding free slots than those of us who could only fly evenings and weekends.
Flying in the early morning is great! Much better than in the evening after a long day at work, if given the choice.