Hello there, @rociohndz_27 ...
Sorry to read that you are having troubles logging in to your school's Canvas environment. I am not 100% sure, but are you logging in to a paid Canvas environment? If so, your school's Canvas URL would look something like:
https://SchoolName.instructure.com where SchoolName is the name of your school.
If you are logging in to the free version of Canvas (called "Free For Teachers), then that URL would look something like this:
https://canvas.instructure.com
If you are logging in through a URL like in the first option (not Free For Teachers), I would highly recommend that you reach out to your school's Canvas administrator(s) or someone from your school's Online Learning / eLearning / Distance Education team. They would be the best ones to help you get logged in to your school's Canvas environment.
I hope this will be of some help to you. Let us know here in the Community if we can do anything else to help...thanks!