growing mushroom

Hello , I recently bought PE from online and two grow bags from two different companies. Both bags have no growth and it’s been almost 4 weeks. Environment is good , everything was sterilized. I’m going to buy the PE agin from 2 different companies just to reduce the chances of me getting a bad...

Would like to dip my toes in growing mushrooms out here on the homestead, mostly after edibles for food and trade. Any beginner PF-tek links out there? Looking for substrate recipes and guides trying to do my homework. Thank you for all the help. BH