It seems you're wanting to renew your Apple Music subscription with an Individual membership. I'll be happy to help provide guidance with this issue today.
Since you're not seeing an Individual account to choose to renew with, it sounds like UNiDAYS validated the university you attend as eligible for the Student membership. The following article will provide more details:
Get an Apple Music Student subscription
Specifically, this piece of information may help to clarify the membership options:
Periodically, UNiDAYS re-validates your student status. If UNiDAYS finds that you're no longer a student or if you have a Student subscription for a full 48 months, your subscription automatically becomes an Apple Music Individual subscription.
Cheers!