To build your reading list in Canvas, you first need to add the "Course Reserves" link to your left-hand menu. You and your students will use this link to access the reading list.
In your Canvas course, select Settings at the bottom of the left-hand menu.
In the Navigation tab, scroll to Course Reserves. Click the three dots, then click Enable.
Scroll to the bottom and click Save.
Now you can click on Course Reserves in the left-hand menu in Canvas to go to your reading list.