Soon to be Husband Leaving the Military

My fiancé and I have been together for almost 6 years. We’ve been dating since high school and he has been in the Marines for 4 years. We get married in 12 days and then he will be using all of his saved leave to take an early EAS. We’ve done long distance for his entire service time and while he was deployed. We are lucky enough to be able to see each other often. I’m so excited for him to be home and he will start college in a few months. What is the transition period like? What should I expect when he gets out? He has been a little on edge recently as I expected because I know this is a huge transition for him. Any advice helps. Thanks :)