I worked at dealerships all my life. Basically you just wash wax and install the mats in the new cars. Customer details never had paint correction on them when I did it. It was clean interior(IMO a spotless interior makes the dealership cust overlook the exterior)high speed buff and orbital wax the outside. Windows and other little stuff
Ive never heard or seen a dealership do a paint coreection on any car. Thats what outside companies were for and then somtimes IMO they did a worse job then the dealership.
In dealerships you get alot of KIDS who think they are detailers. Put a wash bucket and wax rag in a kids hand and he'll tell you hes the best detailer out there.
On the other hand I think I picked up some usefull info but not enough as looking at sites like Adams, buying the proper tools and chemicals and experimenting/working on cars.
At the end of the day you are still a detailer but not in the sense of the true meaning of the word.
Right now I work next to a small bodyshop and they detail car regularly. Swirl city. They know I only do it on the side but dont know how long it actually takes to get a car looking the way I think it needs to look. They were crying the other day that they had a black 4dr Audi SUV there and they only had 3 hrs to detail it. Heck some of my washes take 3 hrs
Just my 2 cents