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Congratulations! Learn all you can! Let me know how it goes. How long is the internship for?

My sister's name is Anita. Are you my sister? :D

Thank you! Years of my working in a busy public library helps! Let me know what happens!

You could find another coworker or two to help you. Or do a triage-type thing, taking the easiest questions and asking customers with tough problems to wait until you get rid of the easy ones. BUT...

What would? Choose one that would have a positive solution.

My frustration would be if too many customers need help at the same time.