Newbie...questions
The first decision, is will you like RVing? Best way to find out is to rent or borrow one and try it for a week.
The next question, is what type of RV?
The choices are:
Pop-up trailer (cheap to buy and own, low maintenance, towable by nearly any vehicle). These are generally best for short term, recreational camping, (due to small size), and preferably in good weather (due to canvas sides).
Slide in camper (cheap to buy and own, low maintenance, takes up the entire bed of larger pickups). These are generally best for short term, recreational camping, (due to small size) and particularly where length and/or road clearance are limited.
Travel trailer (Cheap to moderate to buy, cheap to own, low maintenance, can be towed by any vehicle with enough capability). These can be suitable for any type of use, depending on the size and quality of construction. They can be a problem to tow, unless you have the right hitch, set up correctly. Due to a lower height, they have less wind resistance, but less headroom.
Fifth Wheel (Cheap to moderate to buy, cheap to own, low maintenance, can only be towed by a larger pickup or specialized tow vehicle with enough capability). These can be suitable for any type of use, depending on the size and quality of construction. Generally considered easier to hook up and tow than a travel trailer, with an overall shorter length for a given floor plan, but takes up a lot of the truck bed and is a 'two-level' floor plan (steep set of stairs to portion of floor plan which is over the truck bed). These seem to be the towables preferred by most 'full-timers'.
And then there are the motorhomes. Since they are complete vehicles, they are more expensive to buy, more expensive to own and require more maintenance than a towed RV. Plus, with the possible exception of the Class Bs or very small Class Cs, once you reach your destination you can't practically drive it around, meaning you will either need to rent (or borrow) a car at your destination, or tow one.
Class A - This is a Motorhome specific chassis; basically a bus. They tend to be the most expensive, and the most luxurious and spacious, with the greatest towing and cargo capacity. Seems to be the most common motorized choice for 'full-timers'
Class C - This is a van cab and chassis. They tend to be cheaper and smaller than class As, but other than that they are less useful for long term usage. If you have small, agile kids, the over cab bed can be a plus. Generally they don't have much towing or cargo carrying capacity. I've seen some lately which are built on a large truck cab/chassis, which may be more useful than those based on a van.
Class B - This is a van cab/chassis and body, outfitted for camping. Also called a 'van camper'. These are very small, so can fit in most parking spaces and some garages, with comparitively good gas mileage and slightly reduced maintenance costs. On the other hand, they are very small, with cramped living space and low cargo carrying capacity. These shine for travelling from place to place, but may be less pleasant for staying in once you get to your destination.
Thanks