Hi !
I went to Canada last year for a student exchange in the Concordia University, which is in Montreal. It was an amazing exoperience and I hope to go back soon ! But, before, I left for Canada I was a little bit confused, as you are, and I found a website on which you could tak a look, as it gives advises on what visa you should get to go to Cnada as a student:
http://beta.gullivearth.com/en/guide/administration_5/170/canada.
I hope i helped you.
Good luck
