I agree with the_rookie, if you're going towards a CPL I'd skip the PPL stage entirely. Save yourself some time and money and head straight into the CPL theory and training. Most good flight schools should offer a CPL theory course.
Out of interest which book(s) did you use to study for your BAK? As someone who has self studied everything whilst working full-time I started out using ATC but found them very difficult to absorb. I switched to Bob Tait's books and it just suddenly all made sense. They were much more geared towards teaching you what you need to know rather than exploring things to a great depth. I used BT all the way through my BAK, PPL and CPL exams and passed each exam in the high 90s. The whole ATC vs BT thing is a matter of personal preference but I'd highly recommend them. To give you an idea of the workload I studied for my PPL exam from scratch around one hour each night after work and four hours spread over the weekend for 3 weeks and passed with 95%.
Good luck!
