Hi @Jumana-Ehab ...
Please check out the information that @NoahBoswell posted below if you want to delete your Canvas Community account.
If you want to delete your Canvas LMS account on the Free For Teacher (FFT) version of Canvas (FFT is located at https://canvas.instructure.com), please let us know, and we can reach out to someone who can help.
If you are wanting to delete your Canvas LMS account on your school's paid Canvas environment (the URL would look something like https://SchoolName.instructure.com), then you'll need to have a conversation with your school's Canvas administrator(s) about that (or someone from their Online Learning / eLearning / Distance Education team). They may policies and procedures in place already that relate to deleting Canvas accounts.
I hope this will be of some help to you.