First off, do lots of research and lots of looking. As first timers, I would not recommend buying anything until you have walked thru at least two dozen RV's and driven at least 6 of them.
Without lots of detail, let's cut to the chase:
1) What's your budget?
2) How handy are you guys with mechanics (engines, suspensions, generators, etc) and home repairs (plumbing, electrical, mechanical)?
MOST RV's are entry level garbage designed for family weekend trips. If you as a couple plan to spend at lot of time in a rig, 80% of the stuff out there is wrong for you.
And you have no clue. Please, do your homework.