Knowing that my Bronco was coming soon, I practiced ceramic coating my old 2013 Ford Focus. Seems super intimidating at first, but it was actually surprisingly easy to do, completely agree with
@13Fox. I used Adam's Polishes stuff, which is not quite "professional level." I don't know if the professional level stuff is more difficult to apply, but I had zero issues getting my Focus coated. Is it 100% perfect?? No, but I also don't need show car quality results on my Bronco, just need something to protect the paint a bit.
If you're vehicle is brand new from the dealership, you probably don't need to do much work. But yeah... you are supposed to do paint correction before you apply it. My Focus has obviously seen some stuff in the past 10 years, but I only paint corrected the hood because... well... honestly I was lazy and got bored. Pretty obvious that was a mistake, should have paint corrected the whole vehicle. Otherwise you seal in the imperfections in the paint.