Admin school is only available to members who have been promoted to eG. Once you have eG level access you can see available admin classes or request personal training.
As for regular events, we don't have our own division calendar, but all INS events are on the eGO calendar that Dan posted. Some of the highlights are weekly Thursday Boot Camp run by SCSWAT and Friday Scrim Training run by Lightningcount. We also have regular Boot Camp Scrims on Sunday nights.