JohnGV,
Here is what most people on the Modular route do:
1. Get an ICAO PPL (Canada is ICAO, so your Vancouver plan is fine).
2. Build hours to 150 by solo hire - You can't do a JAA CPL before 150 total time.
3. Complete ATPL theory (You could do 9 CPL theory exams, but then later you will have to do all 14 ATPL exams, so just do them to start with). You get 18 months maximum from passing the first exam until you must pass the last one. You then get 3 years to complete your CPL and Instrument Rating. You can do ATPL theory by distance learning or on a full time classroom course.
4. Complete a CPL course. At this point you could fly for pay, but it is unlikely you can find a job yet as your hours will be too low for most employer's insurance companies to cover you.
5. Get a Multi-engine piston rating. Some FTOs offer a Multi-engine CPL course, which might save you some funds due to a combined ME/CPL check flight.
6. Complete an IR course. You'll be close to 250 hours by now and should be insurable in some flying jobs.
The next step could be any of the below:
7. Seek work flying single pilot piston aircraft, single or multi-engine. Things such as sky-diver driver, aerial photography, etc. come to mind. Forget air ambulance work until you have more hours.
8. Become a flight instructor.
9. Complete an MCC course and seek a job as an airline First Officer. You might find the only jobs available require you to fund your own Type Rating to the tune of £20-25K. If you have it, fine. If you don't, do step 7 or 8 instead. Eventually, you will need to do the MCC course, but it might be best to do it just before an airliner Type Rating course.
Finally, you can do the hour building to 150 before, during or after CPL or ATPL theory, or any combination of the three. Most people do it before.