No, I am not a trainer. I have, however, read the Trainer Academy CPT Textbook cover to cover (well, sort of, it was a PDF).
Yes, I am an amateur natural bodybuilder, 68 y/o 6'0" H 218 W. I have a gym in my basement, and follow an exercise routine heavily influenced by the Competition Training Program laid out in Book Two (Chapter 6) of Arnold Schwarznegger's The New Encyclopedia of Modern Bodybuilding. I also follow a high protein (200g/day) diet, favoring organic and avoiding processed/fried/junk foods, and excluding alcohol.