I learned to fly in Pipers. Cherokee 140 and 180s. After earning my ticket, it became obvious that a lot of places rented only Cezznas, so I decided to transition to the 172.
I found the Skyhawk to be enjoyable to fly, and almost laughably easy to land, mostly because (for the first time!) I was able to actually SEE where the wheels were! Up till then, all my landings had been "by feel", Piper-style -- but in the 172 I could "feel" AND see. It was great.
The opposite pitching motion with the flaps takes a few minutes to get used to, but in real life you just react -- if it pitches forward, you trim back, and vice versa.
You'll like the electric flaps, at first. They feel so...civilized. After a while, though, you'll start to miss the speed of deployment and positive feel of the ol' "Johnson bar" flaps on the Cherokee.
When the world disappears while turning base-to-final, you won't like it. No one does, but you get used to it.
The Skyhawk and Warrior are both great, easy-to-fly planes. You'll have no trouble in the transition.