I can certainly say it is difficult, especially since Canada's so large that travelling between urban centers (which is where much of the art community finds its patrons) is difficult if you don't have much money to begin with.
As for becoming known and getting popular, well again since the art communities are closely knit with the urban areas, and the distance between them, your popularity would differ from region to region. You may be a star in Edmonton, but people in Montreal or Halifax would go "Who?"
I'd say it's no more difficult being an artist here than anywhere else, there's just more commuting involved. Many places would have art guilds (such as PEI here) where you could get an idea on grants, comissions and stuff.
In the end, Nothing's ever easy.