I am a novice skier, so could do with any advice on the best resort to try in Canada and how long does the ski season last?

I have no idea sorry for that.
India

Ski resorts in Canada stretch right across the country, with the best being in British Columbia, Alberta and Quebec. The following resorts represent the best of the best by any standard – long runs, sharp drop offs, and spectacular scenery plus a range of activities, such as heliskiing and glacier skiing.

I found this site and hope this help Ski Resorts in Canada, Ski Canada, Canadian Ski Resorts

Situated in the British Columbia Coast Mountains, under 2 hours from Vancouver, Whistler / Blackcomb is Canada's top ski destination and one of the best in the world. I have been there lots of time. There are other activities also like Zip trek, tube park, dog-sledding, horse-drawn sleigh rides, snowcat tours, heli-skiing. Hope you will enjoy it alot!

You can get information about skiing in canada from the following site.

Skiing in Canada | Ski holidays in Canada | Canadian Ski Resorts

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Well i don't know much about ski resort but seeing the discussion i must at least one time visit to that place would be good.

Blackcomb is a ski destination in Canada at the top and one of the best in the world. I've been there many times. There are also other activities such as hiking Zip, tubing park, dog sledding, snowcat horse transportation, guides, heli-skiing.

Vancouver Coast Mountains British Columbia Whistler, / Blackcomb Canada's top ski resort in the world's best under 2 hours, settled. Whistler and Blackcomb mountains by all the amenities you have a city that draws visitors from around the world 2 million a year with the expected village are connected by a pedestrian.