If you’re to the idea of a pop up camper or are shopping around for the first time, a great place to start is TruckCamperMagazine.com. In fact, they have a whole area on their website dedicated to newbies like you:

Newbie Corner
If you’re new to cabover campers, make the Newbie Corner your first stop.  There we have detailed information to guide you in the process of choosing a truck and camper, and how to ensure that your rig is properly matched and safe. Start with the next three articles.

Newbie Corner