US Naturalization: about how long from biometrics appointment to Interview date in Miami, FL?

it takes at least 6 months for N-400 to process from start to finish. You should've waited until you came back from abroad to file or you can reschedule your trip. Once you submitted the N-400, you must be available once they call you in. Rescheduling or not showing up for any immigration case will take a lot longer that you expected. There are millions of immigrants ahead of you.