Hi Melanie Carrettoni , and Welcome to the Canvas Community!
I'll provide a link to the guide for this at the end, but it is rather simple, if your school has enabled profiles. If your school has not enable profiles, then you may want to contact your Canvas Admin/Support department.
Student Guide: How do I edit my profile in my user account as a student?
If your school has not enabled Profiles, there is still some personalization available und Settings in your account..........
There are lots of other good stuff you can look at in the Profile and User Settings chapter of the Canvas Student Guide.
I hope this helps,
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