Assuming you are in Ontario and you have a car to explore around, Ontario Parks offer many beautiful locations.
Go to https://www.ontarioparks.com/park-locator and select the activity called "Canoeing". Then open it up on Google Maps to find out the location's rating and reviews. Personally, I would select Canoeing, Swimming, and Comfort Stations since I always bring my kids.
Make sure you choose smaller lakes instead of big ones like Lake Ontario.
FYI, if you buy this year's season pass, it will be good for next year too.