I was in the same boat as you, had my black 350 for 18 months ( second car ) then bought my Nismo almost a year ago, also brand new.
Get a check list of things to check, I might have posted on on here before but I can't remember.
Bring a VERY powerful torch to check for damaged paint etc at the dealer before you sign anything, check the shipping spacers are out before you drive off.
It's not a case of seeing swirls as it is preventing them. Use of good quality products is important, but technique more so!
I'd recommend getting the paint protected some how before you drive it too long/far. I had my front covered in PPF vinyl, but others choose to go for ceramic coatings - do some digging and pick one, but I'd go for some protection!
I haven't found any hidden features yet, apart from hitting certain buttons loads up another screen for the same thing. So for example if you hit Map, then hit it again, it will show a picture of the junction etc. OR it will get rid of it if there is on present. Have a play with the buttons
Get in to the habit of finding a save place to turn off the headlights before you spray your windshield - saves you from dousing your car in washer fluid from those STUPID headlight washers.
Heres what I did, had a few more but lost the list.