For your first time, and for want of great results on multiple colors, etc.
Visit
www.pinnaclewax.com , go to the PC sections, buy the HK 7424 PC kit/with pads. This is a great starter kit at a reasonable price and free shipping.
Then, shop around, but the OC/OP are well liked and get the job done, while finishing down very well, even on black. Follow with your favorite sealant or wax. Take a look at the Menzerna twins, as they are well respected, but aren't quite as versatile as the Optimum products.
I like Poorboy's Natty's Blue, Collinite, Pinnacle Souveran, 3M Liquid Show Car, Meg's #16, 26, as well as others for LSP's.
I would also like to suggest that you pick up a MF Starter pack, your Optimum products, and any Poorboy's or Clearkote products from Scott @ Specialty Motoring Products (
www.specialtymotoring.com). Cheapest and best MF anywhere, as well as fast service and great customer support.
Good luck!