Owning, maintaining and operating an RV requires some physical agility and effort/strength. You will need to "hunker down" and connect a drain hose to empty black gray water tanks and need to fill your fresh water tank. You will need to deploy and store your awning, fill your gas tank, and check your engine oil. If you intend to sleep in an overhead bed, it requires ladder climbing and some effort getting into and out of bed safely. There is a "house battery" and an RV generator that need maintenance. At 82, things that were once easy have become difficult for me but still doable. There are a number of technical and maintenance things that others can do for you, for a price. Buying a new or a used RV is tricky and you can make costly mistakes unless you equip yourself with knowledge or get help deciding what kind of RV you want, features, age if used, brand name, model name/size/floor plan, etc.,
Consider total cost of ownership and use: Initial price, financing charges, depreciation, insurance and emergency road service, DMV registration, maintenance services, fuel cost, RV camp space rental, incidentals, etc. Not meant to discourage you but to make you aware if you are not already aware. Consider a used Class B like a "Road Trek". Easier to drive, more expensive than Class C, usable as a get-around vehicle and camper. Good Luck!