Hi Yaman,
I'm sorry but I don't have an arabic keyboard but I'd like to advise you in your issue
I'm a syrian graduate student in the united states and I came here about a year ago
Since you have a friend in Canada and you don't have any financial problems to pay for your study
I don't think you will have a major problem finding an apartment to live in, besides you can find a room
in the university dorms but you have to start looking early ;there is always a limited number of rooms
It's better to start your study from the undergraduate because you'll have more friend and better social life.
any way, if you have any other specific questions please don't hazitate tell me about them