Navigate to a module in your Canvas course:
Click the plus button and choose external tool:
Then, scroll to the very bottom of the list and choose Zoom:
Enter and page name and make sure the "load in a new tab" checkbox is selected. Then click the "Add Item" button.
That's it! You've successfully added a Zoom room to your course. Now, you and your students simply click on the link and it will launch you into your Zoom session.