You will need to file in a civilian court. As for medical and exchange, you will be covered up until the divorce is final. Then you will be given the option to pay for COBRA coverage for a year at your expense. It is very expensive. You will need to work out a separation agreement as to support before the divorce. He is required to help with support, but usually only the difference between married and single BAH is required. This is something you need to negotiate. Good luck.