Yeah... QUIT before its too late!
Seriously, 23 years ago when I started.. I knew the rules ok, but not great. The main problem was mechanics. It took several years of trial and error and a lot of (constructive) criticism before I think I finally felt I knew what I was doing.
Point being, my class of new officials did not get much of that kind of training and I wish we could have. Seek it out, it will make the games go much better for you!