You should not have any problems not speaking French, everyone working in service s bilingual, and i'd say 80% of regular Montrealers. You only risk running into trouble if you go out of the city into the countryside. When are you going? I think he francofolies started, next it's jazzfest. Free concerts downtown all day every day. What are your interests? I can recommend you some stuff to do too! MTL represent 😉
Unless things change I probably won't be able to head out there until late July, early August. My interests are pretty varied. Music and art are always a big thing for me when I visit any major city. Any like botanical gardens, or easier nature trails I'm always a big fan of. I'm interested in good coffee, and good food. Honestly any places of interest I will do my best to visit.