Hi there, @LissetRomero ...
When you look at your "Courses" >> "All Courses" screen ... How do I view all my Canvas courses as a student? ... Are any of the courses you are trying to access published? There is a column on the "All Courses" screen that indicates if the courses are published or not. If the courses are not published, your instructors have not made the content available to you and your classmates yet. Generally, your instructors should publish courses on or near the official course start date. You may want to reach out to your school's Canvas administrator or someone from their Online Learning / eLearning / Distance Education team if the courses have already started yet the courses are not published. They would be able to do some more investigation on your behalf.
I hope this will help!
