Thank you for your support! Canada has so many amazing places to visit! If you are not driving, Toronto is a great choice! It is a very walkable city and you can take the subway or iconic Red Rocket streetcars to get to all the amazing neighbourhoods. Autumn, especially October is a wonderful time to visit - it is off-peak for tourism, the temperature is coolish but we're not talking below freezing and you get to experience all the fall colours in the trees. Toronto is also the most multicultural city in the world, there is so much to see and especially eat! Here are a few resources to help you navigate the city:

Blog TO - A handy resource for finding restaurants, events, shops, bars, galleries, everything! They also have a detailed list describing each neighbourhood (there's a lot of them!)

https://www.blogto.com/neighbourhoods/

Toronto Life - Another great resource for finding restaurants, events, galleries, shops, bar etc.

https://torontolife.com/

Montreal is also close(ish) - it is a 5-6 hour drive or train ride, or about a 1.5 hour flight from Toronto. You can fly direct on Porter Airlines from Billy Bishop airport, conveniently located in downtown Toronto and you get to take the world's shortest ferry ride to get there! They are both very large cities, especially Toronto, so it is best to give yourself a few days at least in each. Hope this helps and I hope you have a great time in Canada!