Lots of good things already, but one thing stands out to me: agree with your instructor *when* you are going to commence the retraction cycle. Bear in mind it is a single, goes down at something like 700'/min without an engine at best glide, and takes around 10 seconds each way to cycle the gear, so you could argue you won't start before say 300' AGL - which is a lot later than you'll want to when you find out how much better it goes when the gear is tucked up.
Apart from that, if you lready have PA28 experience, you shoudn't find it too difficult: the wobbly prob means forward from the right (ie mixture, revs, throttle) and down from the left (throttle, revs, maybe mixture), or 'rev up, throttle back' depending on your instructors preference
You might find initially approaching the circuit you have to actually slow down, which may not be something you are used to - if you get the speed below Vle before crosswind, you have to choice to drop the gear early and 'speed up' your 'slow down' if you are somewhere busy.
One stage of flap (bear in mind the lower limit speed for flap vs. gear) just about counteracts the trim change you get from dropping the legs (well, at around 105kts in mine it does), which if you've got the speed back early, saves a certain amount of frantic re-trimming.
Have fun!
IFR