Yup look for all the info and advice you need at shroomery.org

Edit: this is my first lemmy comment

from what I hear, a good place to plant them is in a cow pasture

My brother got on a kick where he spent a lot of money and energy growing mushrooms and his first batch was a total waste. He went back a second time with some distended techniques and got some product but not much. How 3rd try was better but still not a lot of product for all the effort.

Unless you're in Idaho or Georgia. And technically in California you have to register as a "researcher". Many sites won't ship to CA, other sites basically just say "it's your responsibility to follow applicable laws".

Either way, ideally you wouldn't have to rely on loopholes to seek care.