Have you had experience camping at all? Most of us RVers probably started as tent campers, either with parents, scouting, or on our own as we became adults. Knowing whether you like getting out into the woods and lake areas for hiking, fishing, photography, or sightseeing might give you some hints as to what you plan to do with an RV. Getting out into the country versus resort camping (more full-serve, cable TV, activities, swimming pool, etc.) may indicate the need for better mobility (motor home versus a trailer/tow vehicle).
One aspect of a class A or C is that getting those types of vehicles into small parking lots while sightseeing is difficult. Having a "toad" (a smaller car in tow) will allow you to get away from the campground to see those interesting places. Having a travel trailer or 5th wheel allows you a vehicle to use for exploring and is somewhat similar with the class A/C and toad in this respect. Personally I think a trailer with a tow vehicle is less expensive and more versatile, but many will swear by their motor homes for their own reasons.
As noted by another poster, renting an RV might give you better vision about what your end game might be.
Good luck with your quest. Be sure to visit this forum often just to read the various threads relative you issues that interest you. I'm sure you will gain some good insight regarding future plans.