I work as a detailer by the way
Galaxy being a dark colour and also that you paint will be new DONT USE ANY CUTTING PRODUCTS they produce swirls.
When i got the car back if it was mine I would.
Polish the whole car with a good quality polish ( I use meguries wet look polymer sealent and havent found anything better yet)
Then apply a good quality wax (Meguries once again for me Gold class wax being my choice)
Try to do a follow up waxing with in a couple of days. and then say once every couple of months.
Washing only use a little bit of a car shampoo (not truck wash crap) Mothers / meguries both make good gentle car shampoos.
Make sure you rinse the car off really well before washing it.
Make sure all sponge's and chamios's are clean when you use them.
And you should be pretty well right.
As for the meguires plug well my ute is proof that it works a treat and so was my old car.
For a pic of the old car look in my gallery