Affiliate Marketing Secrets

So next year im hoping to be doing a year abroad in Canada for my studies,
However ive looked into work visas so i can pay rent and other such things, but all i can find are sites for people who are specialised professionals that fulfil a niche profession, and you need to have your employer on board before you apply.
What Im wondering is, can i get a Visa that allows me to go over to do my studies, but then apply for a normal job(Retail, restaurants etc) while im there, just so i don’t have to get into a stupid amount of debt and always have to worry about money
Any information on this from anyone who has done this thing before would be really appreciated.
Thanks