3 people, not 4. One guarantor and 2 references.
And it seems hard to believe you don't know 1 Canadian citizen and 2 other people who live in Canada, but whatever.
The guarantor can be "skipped", have a look here : https://www.canada.ca/en/immigratio...ments-references-guarantors.html#no-guarantor
The references, well, you'll need to ask people you know. Unless you've lived in complete autarky, you've met at least 2 people who know you exist, ask them.
The question isn't "knowing" people. The question is will they chicken out. You have no idea how many of your "friends" will immediately freak out and say no to become your reference.