I'm planning on purchasing a used Class B early next year and taking a few leisurely months traveling around the US. I'm retired, older than dirt, and have a short "bucket list" mainly golf, bowling ...
when we were shopping- youtube videos from RV dealers were really handy at showing features and esp. the ease with which the sales person moved around the coach...sometimes not so much. storage features and the "systems" gas, ac, dc, plumbing etc
the more you "kick tires" the better you can order your needs.