Wars are won or lost by pencil pushers. True story.
Getting blown up is interesting, as long as there isn't any blood spilled. Most involved an instant heat flash like someone opened up a furnace door just for a moment. Hard to explain exactly how it goes in the first second. It
feels like it was loud, you can feel the shockwave, but all sound after the initial crack is muffled. Like what it sounds like under water. Air turns into instant dust/sand/murk at the moment when you most want to be able to see every fucking thing around you. Usually some confusion, because the world you were looking at isn't there any more. Especially so if you were unconscious for a few moments/minutes. Even more so if your vehicle has reoriented itself and what used to be "up" isn't up when you come to. Radios almost always go out for a few minutes for some reason. Brain sometimes takes a while to reboot as well.
Only physical injury was a stupid accident that happened when one of my Joes decided to fuck around with my knife. Almost sliced my thumb off. Been diagnosed with TBI, but that's like saying "hmm, something is wrong but we don't know exactly what it is." Had migraines for a while, but they have mostly gone away now that I'm hyper aware of everything that triggers them.
Make copies of everything and save them digitally someplace that will survive the end of the world. You'll need medical records when that ache you've been ignoring for the last few years turns into something that we eventually find out was caused by something the military did.
If you've been career military, becoming a civilian is going to be interesting. You've been surrounded by people that have had identical training to your own, have dressed like you, have been required to adhere to the same standards (personal and professional), have been promoted using the same criteria, etc. None of that will be true when you cross over to civilian life. Don't expect anything from the VA. The first few weeks will be empty. You will be starting over, just like you did when you entered the military, with the difference being that you are older, more experienced, and you have extra money coming in every month. Find a job you enjoy, instead of a job that pays the bills, and you'll do well.