I want to echo Janet’s words and would encourage you to look at a nationally accredited certification such as ACE or ACSM. Even if the recreation center where you have been asked to teach will accept FiTour, you may not be able to get a teaching position at another club. I can at least speak for the club where I teach.
Often, once you teach at one location, other possibilities may open up to you. Clubs are always looking for good instructors.