I m bds what r the bst courses for me in canada .wat abt dntl hygnst n mph ?any visa related issues in both?

I hv compltd bds with overall 67.5% and planning to study in canada.wat are the bst courses for me there.? i hv decided to either do mph (masters in public health) or dental hygienist.what are the scopes for both? are there any visa related issues for both ?what are the gud colegs for rlatd courses?