this is all new to us

I also agree that you should take a short trip before you head out on a long trek. Remember less is more and weight is a factor and everything you bring in adds weight. You can buy most anything you need on the road at Walmart or the Dollar Store (great place to buy storage and organization items). Start a list by category of what you'll need that you may forget like can opener or wine opener (a must!). Do a list for Food, Kitchen, bath, linens, then a list for outside. Get Corelle open stock dishes from Walmart (4 ea. plate, cup, bowl). Get a 4 pack of plastic drinkware. We use paper plates to limit dish washing. 2 skillets: sm and lg. 3 pots: sm, med, lg. Small appliances like toaster, coffee maker. We bought the simple Mr Coffee with no fancy clocks or timers. They seem to work better with our inverter. For clothing keep it simple. We never wear anything but jeans and shorts and tee shirts. A light rain jacket. For food, get a plastic bin and start putting stuff in it now so you can take it back out. Canned goods weigh more than dry goods so we limit how many canned goods we buy and haul around. You can buy more on the road. We can't get by without our 2 folding chairs and our gas BBQ grill. Also a small box fan for outside in Florida will help with bugs. A step stool or small step ladder and a small tool kit with the basics. When you dump the tanks, make sure the hose is correctly connected at the RV. When we were newbies, we learned this the hard way! For your first few trips, plan on traveling 3-4 hours and stop at a campground early. Make sure you know your route and stops and plan your fuel stops so you don't get stressed. Later you can "wing it". Once you leave, relax and enjoy and be patient with yourself. You will learn as you go. For the first year our night reading was manuals! LOL.