The first step to growing marijuana indoors in Michigan is to choose your grow room.
You need a room with enough space to have 3 separate controlled environments. A space for plants in the vegetative state, another for plants that are flowering and finally an area for drying your crop. Additional space for supplies, a trimming area, storage space and room to move around.
An extra bedroom, basement, attic, garage, pole barn or any other space that is discreet, locked, has access to fresh air and electricity.