The common Elderberry in Canada is Sambaucus canadensis, Sambaucus nigra is the European Elderberry, both are edible.
Are you able to find a wild Elderberry in your area? The easiest way to propagate is to wait for buds to swell in the spring and then take a good sized cutting and bury most of it. If kept moist it will root without problem.
Not sure where you are in Ontario, your profile doesn't say. I know of several sources for named varieties if you want to mail order. These give higher fruit yields but the wild type is worth growing as well.

Mike

Thank you for the good advice on how to propagate Elderberry. I do know where there is wild elderberry growing, but it's in a conservation area on a public trail. I can't take cuttings from there, I guess I will see if I can find anyone who might have them growing on their property but I'm not sure how to find people. Maybe put up an ad in kijiji!