I would start by putting all of your tent camping items in the pop-up camper. You may even find taking along your original tent to be of help also. You'll want to get your Basics like dishes plates cookware. You will also want to get your clothing items personal hygiene items together also.
One thing they don't teach you when you get a pop-up is how to set up the awning. We were fortunate the first time we went camping with our pop up that and it good neighbor camper came running over to us and gave us a tip. He told us to set the awning out first before cranking it up because reaching to the top of the awning when it's already raised is really difficult to do. So from the very first time we went out we started doing it that way so set the awning out first and then crank up the top. You'll save yourself a lot of aggravation.
Most important have a lot of fun and enjoy