How long to train?
Do it in layers. Go thru the course once & then take a break from it.
Then go thru the course again stopping to learn each step. Take another break.
Practice the PhRing technique daily.
When you feel up to it, activate a book that is fairly easy and 200 pages or less.
It took me 3 months or so to really learn and practice all the steps. It took me longer to get really comfortable w/ the system. The reason i stuck w/ it was because i noticed other, very helpful, things about the course while i was learning it.
I had never really practiced learning in layers....consciously. It's the way we all learn, but when we know this, learning becomes less of a burden if we don't expect to get it the first couple times.