I have been ceramic coating all our cars for many years, I got some done at detailing meets I used to arrange, I never use wax know, Carpro I used, did a few myself as well, the machine polish prep is the most important and time to cleanse and leave time to bond coating or dried with infrared heaters.
it depends on how long you plan to keep car and the cost to correct the paint back to near perfect is tha balance that needs thinking about, lots of info on Detailing World, one of my hobbies used to be detailing testing products and having companies doing demos at my meets I arrange, I was friends with Craig that used to run carpro Uk , he used to come up to most meets I had, great experience and knowledg.
This is wet look, not photo edit that is just as pic taken on all pics
top pic carpro ceramic with topper , belies newly coated carpro ceramic for wet look I love