Its weird where i am people dont want them, very weird. I prefer working with clones, but yes you could take spores from dried mushroom though youd have to be a good mycologist to isolate it from other contams in petri dish.
Dude growing mushrooms is the easiest thing to grow when you know how they work. The most crucial thing is the moiture content, FAE and sterile procedures. And btw all that pile is the result of 5 flushes from 2 tubs of a mushroom i cloned after crossing cambodjan cubes with thai.