Unlike other jurisdictions, there is no such rating as the TRI/TRE in Canada. Organizations such as FlightSafety and CAE will provide the requisite training to run their simulators if you were hired by them or hired by a company that leases their simulators. However, those courses only cover the safety features and software installed in the simulator. Subjects such as instructional techniques, grading, and debriefing strategies are taught by the company through a train-the-trainer program. There are airlines who hire contract instructors, and in those cases you are often expected to outline your previous instructional history, for example you might be asked to outline how many hours you have teaching in a simulator or classroom. So that handles the instructor qualifications part.
As for walking you through an exam, you're better to go to a flight school and ask them to help you transfer your licenses. Your profile says Milton, Ontario, so
Spectrum Airways at Burlington Air Park is your closest school. I transfered my New Zealand licenses with them back in '07. They've got good facilities, well maintained aircraft, and are close enough to major airports that you can get all your work done, but far enough from those airports that their airspace restrictions don't become an obstacle. Their training area is also within about 5 minutes of the airport itself, so you're not spending half the flight flying to the box and back. There are other schools in the area too, such as Brampton Flying Club, Flight6ix in Guelph, Waterloo/Wellington Flight Centre in Kitchener, and Golden Horseshoe Aviation in Hamilton. I suggest you go to the schools because there are very specific requirements that must be met when transferring a license, and doing it on your own, while doable, can become costly if you simply assume that you'll meet the requirements.
Finally, there are other threads that already discuss what resources you'll need to study for the Canadian exams. Consider reading
this one.