I started out years ago camping in tents, then worked my way through two pop ups. Someone mentioned that they're fine for two people, which is pretty much correct. Kids can crowd up a small living space pretty quick! That's not usually a problem unless it starts raining, then everybody wants to get inside, but you'd have that same problem in a tent.
The last pop up I had came with a roof mounted air conditioner , in most cases, that thing would chill a beef, I usually had to get up in the middle of the night to turn it off. That model also had a heat strip in it, which came in handy when we camped out in the mountains, to take the chill off on those cool mornings. I'd use the electric heat strip in lieu of the LP furnace.
An awning will also kinda/sorta increase your living area, as a matter of fact, I wouldn't own any camper without one. You can even get bug screens to seal in the awning area, if needed.
You'd be surprised on how much stuff you can pack into a pop up with the top down. They tow easily, just about any vehicle can tow one, they're easy to back into position and not hard to set up, though it does take some time.
Good decent pop ups can be bought very reasonably, and if taken care of, can be sold or traded later on for pretty much what you gave for it, just don't get one of the smallest, bare bones models when you do buy.
Camping is great fun, the wife and I love it. She can't retire just yet, so we have to make do with several short trips throughout the year. Like I said, we started out with tents, we've had two pop ups, one bumper pull camper, one class "C" RV and are currently camping in our third fifth wheel.
As you get into it, you'll gain a lot of knowledge of the different campgrounds. (We don't like dry camping) and much prefer the state parks or military campgrounds, but then we have our favorite areas we like in each of the ones we use. The quietest areas in a campground are usually the ones furthest away from the bathhouses and off the main entrance.