Brand new RV'er

Don't be in too much of a hurry to buy one. There are a whole lot of units from brand new to barely usable. I'm on my 4th used one. 1st one was in terrible condition, but for on $800 it was something to start on. Remodeled it myself, including replacing the whole floor. Learned about all the systems and how RVs are put together. Sold that for $3k a couple years later. Bought a big fancy travel trailer. Loved that, but was a pain to move around and park. That got demolished in a conflict with a semi. Replaced that with an identical unit, but by then was a bit gun shy towing something that big. Current unit, I wanted a motor home type. Trailers are good for staying in one place for a while, but a pain for road trips. Ditto with the slide outs. They work well for when parked, but take up room and weight while driving. This is my first "motor home" type unit, it's almost 20 yrs old, but in good shape. Advantage of an older one is you don't feel bad modifying it. Plus $70K new vs $10K used. No warranty, and factory tech is pretty clueless. I've got a background in aircraft manufacturing, so structure, plumbing, wiring etc aren't that big a deal.
As someone mentioned, renting a unit might not be a bad idea, trying out several types and floor plans. I like having the bedroom closed off from the rest of the unit. Towing a trailer vs motor home depends on preferences as well. Tow vehicle vs towing a car. We use a pair of electric bicycles instead of an extra car.
Look around, ask questions, you'll find most rv people are pretty friendly and like to brag about their units and travels.