Should I be a fake aerobics teacher?

So last night was Enrichment night for our ward and afterwards I was talking with a few friends, and just like me, they are all trying to get in shape. I felt very inspired after to organize a "exercise at the church group". I feel like so many people want to exercise but nobody knows how to get started, a lot of people don't want to do it alone, and if they are anything like me, they don't know what they are doing. So yeah, I am thinking about putting something together maybe two times a week. The only thing is what we would we do.....a video, run around the gym. I wish I were an aerobics teacher and knew what to do, I would do it. I just want people, including myself) to believe in themselves and to know that it is possible to do a sprint triathlon, 5K, and 10K. If I can do it, so can they.