Welcome to the Forum. Thank you for your service. You have picked a great hobby to enjoy. There is a lot of info here but don't fail to talk to other RVer's at campgrounds (CG). They are usually more than wiling to answer questions and help you figure this out.
There is a lot of fun to be had and glad you are with us. A lot of us are new and came here like you did to learn and are still learning. Read old threads, ask questions, and there is a ,military group on here if you want to check that out. It's under the Forum tab.
Have a great time and take your time learning. Lynne
Retired January 4th, 2018 Lynne & Jerry RVM 105
04 WBGO Itasca Sunova (Miss May) Blue Ox Tow Bar
15 Equinox (Noxi) 18 RAD Mini e-bike, 04 Tracker