Hello, I need help on the sequence diagram for a library. I have the class diagram and the use case diagram, but I can't figure out how to attach

Hello, I need help on the sequence diagram for a library. I have the class diagram and the use case diagram, but I can't figure out how to attach them to this..

I need to create two uml sequence diagrams that detail the check out media use case for a fictional library system.

In the first diagram, assume the media being checked out is the book "Harry Potter and the Sorcerer's Stone," which has no age restriction.