Admissions are rolling so it may be anytime from now to end of April or beyond (last minute Appts). Typically, NAPS will be via email from what I hear. As far as an actual USNA appointment, that could come from a call from your MoC, an email, or a portal update. If you read through the forums, there have been multiple instances of each. Best approach...enjoy the ride and settle in, it could be a while. In the interim, Plan for Plan B, C, and so forth. Good Luck !