I'l give you an example of what I am doing - which is a fairly common route.
I've got my PPL ( had it already for a couple of years)
First step - GET A CLASS 1 MEDICAL - if you fail this then theres no point spending a fortune on the training
I am currently building hours up to 150 (including 100P1) and doing the ATPL exams, distance learning - all part time.
I'm planning that both these 'events' i.e the exams and 150 hours complete at about the same time, and then I start the CPL training - 25 hours + test.
After this is the multi and IR