You heard correctly. Nothing is easier than fermenting feed. Basically, covering a bucket of dry crumbles with water and letting it sit in a warm place for a couple of days is about all there is to it. However, you will find you will want to fine tune the process to get the consistency you desire and to have the FF in as brief a time as possible.
When beginning, it helps to use filtered water so chlorine residue doesn't slow down the development of yeast. Using a "glug" of ACV can jump start the first batch. Stir a couple times a day to keep the stuff well mixed.
Chickens prefer, or at least mine do, FF that is the consistency of stiff cooked oatmeal, not wet and soupy-sloppy. You can add more dry feed to an FF mix at any time, as well as add more water, to get the consistency your chickens like.
Many of us use two buckets to keep a fresh batch ready to feed as we use the last of the first bucket. Some folks use just one bucket and "back slop", adding more dry feed and water as they feed it out. The FF will go "flat" after a few days, and that indicates the yeast is getting tired, and also that the nutrients are declining. This is why I prefer two buckets rather than back slopping.
As a rule of thumb, each chicken will eat around half a cup of FF per day, and many of us feed half that ration in the morning, and the other half towards the end of the day.
The benefits are stunning. I've been feeding FF for six years, and the number of hens still laying at age six and seven is amazing. Health is also splendid in spite of my flock carrying a deadly avian virus.
One bit of disclosure - all chickens are not crazy about FF. I have two hens that flatly refuse to eat it for some reason, and I feed them dry crumbles.