I was directed to the Marquette instructor database (https://www.marquettemethod.com/instructors/), reached out to a few, and chose my instructor because she had the most personable response. Her soonest spot (virtual) was an individual training that cost $125 for the intro and a year of follow up consults. I have definitely appreciated being able to reach out to her after the intro because I am breastfeeding and return to fertility can be confusing!