Here on the east coast, you can just wait until May comes around and it rains a couple days in a row. Then, you can just go for a walk by your local river/creek and wade through the seas of Japanese knotweed, lesser celandine, and box elder maple while looking for mushrooms growing out of the wet woody debris. Between them and nearby mulch beds, SWIM has allegedly found psilocybe ovoideocystidiata pretty consistently for the past several years, in Minecraft. Just don't try and take any shortcuts with the identification. It's better to throw out questionable specimens than risk needing a liver transplant.