I need a little help.

Ashleigh • Engaged to my best friend and soldier. We have a 5 year old son, and currently ttc our second ❤️
My fiancé is enlisting in the Army again after a medical injury. His waiver is being processed as we speak. He is supposed to call his recruiter Friday. He has to go back through basic and AIT obviously. But I've never been through this. What should I expect? Should we get married before he goes? Or wait until after?