The vast majority of electricity generation in Canada is already net-zero. In fact, most of the national grid is powered by hydro, even taking into account the lack of waterfalls in the prairies. Between Niagra and the east coast, hydro is doing a lot of work, with nuclear being a strong #2 (almost off of which is in Ontario and Quebec).
If we just push SMRs a bit more and properly invest in them when production starts ramping up, we can easily do this by 2035, and we don't even have any of the usual pitfalls of green energy like storage problems, as wind is only like 5% our total generation, and we practically don't have any solar.
Extremely little of Canada's greenhouse emissions come from electricity generation, as we're one of the cleanest in the world. Our emissions mainly come from cows, cars, and heating. That last one is especially bad, and where we should really be targeting more than anything else.
But making our electricity generation net-zero is also a fine low hanging fruit for Canada.