Hi MacKay Roy , and Welcome to the Canvas Community!
You can learn how to accomplish this at How do I edit my profile in my user account as an instructor? Please note that this functionality is the same for all users in Canvas regardless of role.
However, also keep in mind that this functionality is also restricted for users at many schools (all three of mine included), so if you are unable to edit your display name, you may need to contact your school's Canvas Admin/Support department, and ask them to do this for you.
I hope this helps,
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