That's it
I did my old GTI originally first time around with Menzerna FG400 with a chemical guys orange hexlogic. I worked very slowly working polish fully and it didn't need any refinement but removed 90% of the defects on the first hit.
I used the Megs Microfibre system on the roof which was really bad.
as Dan says there's no real go to place you have to try a variety but for the home detailer you don't need to really worry too much.
chemical guys pads are pretty good, if you choose to use chemical guys pads i would recommend gettting an orange or yellow, a green and a black one.
use of some compounds like scholl s3 / s17 / s40 would do you good.
orange or yellow on the metal panels with s3 (or your cutting compound of choice) green on the plastic (can't take the heat, use a medium abrasive here, be prepared to work additional passes on these panels) and then black and a finishing polish to refine.
depending on how you polish you will probably find you will have none to minimal hologramming however it's always best practise to reifne.