Welcome to Canada. Enjoy your trip. You will have no problem with a language barrier in Quebec. Although there are many francophones who speak little or no English generally speaking it is no more of a travel impediment than travelling in Europe or Latin America. I think Quebec is probably one of the most interesting provinces to travel in in Canada and without a doubt Quebec City is still my favourite Canadian city. Stay at the KOA just out of town and take the free shuttle. Easy to use up a week just in that city.
Build lots of memories, be safe and enjoy.
J and A