First thing to do is to go to Autopia University and than buy the detailing Ebook.
It's all in the prep work "polishing contamination removal" and the day to day care washing and quick detailing.
You also need the proper tools Micro Fiber towels or 100% cotton towels, foam applicator pads, cotton wash mitt, two wash buckets, and on and on.
Swirls come from one thing YOU! bad washing-drying techniques, bad polishing techniques., and with a black car doing all this correctly is a PITA.
Lets start with polishing use nothing but foam, 100% cotton terry or Micro fiber applicator pads. Apply polishes using stright- line motions "the way air moves over the car as you drive" never use circles. Keep polishing till the polishing is just about dry, a PC polisher can be a big help.
also do a search or two, their is much more to detailing than one would ever think, just read and read and read this forum.