I hope you've received the reply from NVC by now, since your request was submitted on June 8th and I pray that you receive a positive reply.
From what I've read so far, it can take the Embassy to schedule the interview in 2-3 weeks or 1-2 month after they received the file from NVC, which take ~2 weeks once the expedite is approved...and sometimes, even after the expedite is approved by the US consulate, they'll request NVC to only send the file over once the application is Documentarily qualified (DQ), which can add to the timeline. Regarding the interview question, i guess that would depend on the US consulate that you'll be working with... they'll have to find a special slot to accommodate your appointment.