Mushrooms thrive in dark and humid environments. So choose a location that has both. A basement, closet, or garage is ideal. Make sure the temperature is consistently between 55-75°F (13-24°C).
Many nurseries offer mushroom kits that come with everything you need to grow mushrooms, including spawn and a growing medium. You can grow oyster mushrooms, shiitake mushrooms, or even white button mushrooms.
Create a growing environment according to the kit's instructions. This will require you to keep the area moist often.
Carefully open the kit and add the spawn to the growing medium.