people who said that you should NOT wax your car dont know anything about what wax is, they are stupid actually, without having any know how about the thing and just passing vague statements just to act macho.
wax does not in any way harm old or new car paint, you cn wax your car after every two days, heck every day, and it wont harm the clear coat, let alone the paint.
polish however comes in many different grade levels, some polishes are hard, while some are soft to the paint, either way they take a little layer off the clear coat to get rid of minor scratches, once you polish your car then you could seal the paint again by using wax on it.
buy any decent brand of carnauba wax, Meguiar's and Mothers are not super expensive and are the top notch when it comes to wax.they are a little hard to find, and if you cant find them then buy a turtle wax fo your car.
enjoy waxing your new car, u'd love the result.