You can copy course content such as assignments, modules, pages, and discussions from previous Canvas courses into existing courses. You only have access to copy content from courses in which you are enrolled as a user with instructor permissions.
Courses that are past their Term Dates or manually set Course Participation Dates are still visible to all instructors and participants, but prevent participation or modification after that date. Courses from previous terms are organized and accessible under the "All Courses" list from the Global Navigation menu.
If you are using Canvas through your institution, you will most likely already have a Canvas account and need to accept a course invitation before you can log in. Your institution will email your login information. However, you may also receive a course invitation where you have to create a Canvas account as part of the registration process.