For what you looking for on your new car, Id go with the Megs #80, this is what I used earlier on in the year for my car when it was delivered. Since then I have also go Opt polish which can be more versatile due to how it works with different pad combinations by machine. Either with a polisihing pad will be a good mild start to see what shape your paint is in, without going to harsher polishes if you dont need to.
If you want to clean up new paint with very little defects and increase gloss and clarity you cant go far wrong with Autoglym Super Resin Polish or Clearkote Vannilla Moose Hand Glaze.
If you want to clean up new paint with very little defects and increase gloss and clarity you cant go far wrong with Autoglym Super Resin Polish or Clearkote Vannilla Moose Hand Glaze.