There is a cabinet next to the worm beds. Access this cabinet and take one worm starter and one packet of food. Access the worm bed and add both. Find the water can and add 0.25 water and let them grow. Takes time to get the density up. Dont harvest them right away and when you harvest dont take it all. I like to get the density up to 30% or so then only harvest one time to 25% and they should regrow.
Mushrooms same.
You can over water so keep it to 0.25 - 0.50 and more worms and more nutrient has no effect so dont waste it.
You are correct, that was left out of the doc files