I am going to let you in on a little secret:
Before I joined the army.....and before I went to university......I went to Algonquin college and studied police foundations. They also told me that they had a 100% placement guarantee. I thought I was going to become a cop for SURE!!! I was certain of it. It is complete BS!!!!!!!!!! How are you supposed to become a cop when you are 19 or 20?? You have NO life experience!!! Most forces won't even CONSIDER hiring someone until they are at least 23-25. I know the mounties won't hire someone until they have lived on their own for at least 2 years. My college diploma got me JACK SQUAT! I don't even bother telling people about it, I see it now as a waste of time.
I don't want to discourage you in persuing what is obvioulsy your dream, but I also would hate to see you go into this with expectations that are not going to be met. If you want to be a cop, and are serious about it, start volunteering NOW, go to school, and get as many experiences under your belt as possible. College and the militia alone will not let you obtain your goals, I give you my word.
Hope this helps