When you login to Canvas, your current enrolled & paid courses may be listed in your Dashboard. If not listed in the Dashboard, click the Courses icon, If not listed in the Courses pane click the All Courses link. Your courses will display here.
Courses' links are made available at the discretion of your instructor. Normally, instructors display their courses' links a week prior to the first day of class or on the first day of class. Please, feel free to contact your instructor if you are still concerned.