I want to have an Apple expert set me up on iPhone 7. What is the schedule for Apple experts at South Coast Plaza in Costa Mesa?

You would have to call the store and setup an appointment. Here is their number direct: (714) 424 - 6331.

Just go online to setup an appointment with the Genius Bar

Schedule online. It's much faster. That what I did.

Line up in store or schedule on line

Or go online, and do it, BUT, either way, an appointment is recommended.