There's a Facebook group named "USMMA Class of 2018" which actually includes 43 members. I suspect this group consists of already admitted students. Have you been offered an appointment yet?
there IS a plebe parent fb page , but there is ALSO an "everyone" facebook page that the parents should join as well. It has parents from ALL years and would be a valuable resource for info and support as well. The link to get to the everyone page is; https://www.facebook.com/groups/203310189716742/
There are also fb pages for USMMA parents of athletes, for BAND CO parents, for specific Parent Association Groups, etc etc....