Greetings, Bregibson7.
I see that you'd like to change the email address of your Apple ID and I'm happy to help.
Change your Apple ID -- Follow the steps in this article to change the primary email address of your Apple ID.
Get an Apple Music Student subscription -- And here's the information to update your information with UNiDAYS.
Get help with your UNiDAYS account
If you need help with your UNiDAYS account, contact UNiDAYS Support.
Take care!