Get your herbs. Maybe one or two tablespoons or a handful (you could use a “teabag” or muslin bag to contain the herbs)
Add them to clean fresh water in a pan
Heat the infusion up to a boil and let it infuse (turning off the heat), simmer, 
In the meantime (keeping an eye on the water) set up your space
You may use the pan or use another bowl for your herbal infusion
Wrap yourself in a large towel or blanket and get into a kneeling position with your bowl or pan between your legs.
The steaming experience should be warm and comfortable. If there is pain IMMEDIATELY STOP! Either add cool water or wait 5-7 minutes for the water to cool down a bit. 
You may steam between 10-30 minutes. There may be spotting a few days after your steaming experience. This is normal and apart of the detox process.
Discard herbal fusion after each steaming session.