Hi Luke, congrats on the new motor!
Not sure how clued up you are on safe washing practices and such but polished bliss has some great articles here about washing practices and decontamination etc
http://www.polishedbliss.co.uk/acatalog/car-care-advice.htmlAutoglym stuff is generally good and even though its a new car it'll be worth using the clay and decontaminating the car as it will have collected contaminants on its way to you. I would make the most of the fact that its a new car and give it a good wash and decontamination and then make sure to protect it well using a decent wax or sealant. For me protection is the important part here and this will make it much easier to maintain.
Not sure if you have a machine polisher or have used one before? Sometimes dealer preps aren't the greatest so some defects and swirls may already be present when you pick it up. If you want perfection then asking the dealer not to prep the car and then correcting whatever's there, or just correcting the dealer prep after they've done it will make the car swirl free but its up to how much this bothers you i guess. I know my car has many swirls at the min but I don't machine polish and its something i can live with for now until i get a polisher and practice a bit. As long as the car is well protected then I'm happy.
Never owned a white car myself so don't know much in the way of specific products. I know that Dodo juice do a wax called diamond white specifically for light cars so maybe worth a look? Maybe someone else can give better advice here?
Most of all mate enjoy your new car!