I think I will be growing some, though I'm more looking at extracting some dmt.
Been a while, but your jar should be basically pure white with the mycelium. If you have other weird colors or if it smells like rot then toss. You just sterilize everything well before starting and it isn't nearly as complex as it sounds. Sterilize all the stuff, put growing medium (think I mostly used brown rice/vermiculite) into a container, inject the spores into your medium and cover until you have a nice solid layer of mycelium, put down an inch or so of vermiculite in the bottom of a tote or aquarium, etc. to help hold humidity and dump the cakes out of the jars...I recall misting the sides of the container every day or two, then pretty soon you get mushrooms
I think that was the gist of it, it was based around the pftek iirc.
https://www.shroomery.org/13878/The-PF-tek