Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hi @(Student) Mendez-Marmolejo, Melisa
Looks like you are experiencing a circular MFA situation where the account is asking for a verification code from Microsoft Authenticator, but you cannot access the account in Authenticator because signing in to the app itself requires that same verification code.
Since this is a school account, you could consider contacting your school's Microsoft 365 administrator or IT help desk and asking them to reset your MFA methods or require re-registration of Microsoft Authenticator for your account. Once they reset the authentication methods, you should be able to set up Authenticator again using a new QR code. They can refer to this article for managing and revoking MFA methods: Manage user authentication options
In case you do not know who your IT administrator is, kindly refer to this article: How do I find my Microsoft 365 admin?
I hope this helps.