You’ll get an opportunity to talk to both USAA and Navy Federal banks while in boot camp, they allot specific time to set up new banking/work on existing things! You can ask them about refinancing at that time. Also, once you get to your duty station you can ask about a new insurance rate through USAA.

If you have the opportunity I’d keep the car for A school depending on where A school is located. A lot of a schoolers with cars actually make out well because folks without cars pay them to give them rides and such. A lot of rides share services still don’t have base access.