You know, Steve,
I had to do that once, shop for a surgeon, a brain surgeon. You'd be surprised how many of them told me "I've seen the procedure done, I can do it also." Well, that weren;t good enough for me. Fine if'n I;d broke my leg. But diggin' around in my head, I needed more than "Saw it once on tv." Found one, too. Takes me six months to buy a car....
Koi is like that.
You havta go and do it. You havta go and see it done with your own eyes, then do it yourself with your instructor watching. Whatever "it" is you must do this.
I learned the most from two ways. From my mentors of koi breeding (Suda, Mano, Sakai, etc.) hands on while they watched and commented. The word that applies to them as instructors is "kibiishi" look it up.
From the son of a breeder, "My father gets a blue line on his forehead every day."
"Pop a blue vein," has a different meaning in Japanese.
The other way has been by trial and error.
Yes and some from print. Mostly trade journals, but also hobby mags and books.
Best book for wanna be koi breeders never even once has the word "koi" in it. "A Hatchery Manual for Common, Chinese, and Major Indian Carps." Paperback, ICLARM.
Best method for wannabee koi breeders to learn, go and spend time on a koi breeding farm.
Worst way, try reading a jargon filled book like "Koi Breeding" by Rothbard.
Brett