>>25495621) Consider reading a book about cultivation. Paul Stamets has written a few good books detailing the growing parameters of different mushroom species.
2) Sterile technique is crucial. Consider buying the requisite materials and build a laminar flow hood. This avoids airborne contaminants when you inoculate or manipulate your cultures. This will cost you up to 500-700 dollars.
3) you can alternatively build a glovebox with a plastic tub, but glove boxes are a bitch to work with.
4) Get yourself a decent pressure cooker to sterilise the medium you want to inoculate. "AllAmericanCanner" makes excellent cookers.
5) You'll have to go through much trial and error before you perfect your sterile technique, but you'll get there.
6) Seeing your mushrooms grow and eating them is satisfying as fuck