I hope this helps. I believe I read in another of your posts you have autism? You might want to consider contacting Goodwill in your area. They work with people with all kinds of challenges to gaining employment. Here is a link to the Goodwill website for Savannah Georgia which I see is your location: Job Connection Career Center Locations in Coastal Georgia | Goodwill of the Coastal Empire

This might be the way for you to learn how interviews are structured; what to wear; what the most likely questions will be; how to ask when and how you will be notified about getting the job.

As far as the pay question goes, I don't know why they were even asking; they likely know what the pay is for the places in your area. If you made minimum wage, you could say "Minimum wage." Probably they are trying to weed out people who want to make more than the minimum they are willing to pay (which may or may not be the same as minimum wage).

Please give Goodwill a call and see if they can help you. I wish you the very best.