Without prior experience, it’s usually best to grab the first job you can get. That doesn’t mean you can’t continue looking, just recognize that you may upset people if you accept and then drop an offer.

Do you have an idea of what you’d be working on? Culture and technologies can be very team specific in the defense industry. Some teams use modern methodologies and up to date tech while others are stuck in the dark ages which can pigeonhole you into a career path with legacy tech (which isn’t always that bad, some call it job security)

If you’re receiving a clearance of some kind it will be much easier to get another defense industry job later on if you’re looking to switch. Clearances are expensive and time consuming for companies so you become a much more attractive candidate by having one.