I have experience instructing dance class: I used to teach hip hop and African dancing and currently I conduct circuit training with a total of 5-7 women in at my friends house. Other than that I have never taught in a gym or have experience training one with in one. I am planning on moving out to California and I want to know , what to do and say as I apply for health clubs!
The others have given you some great ideas already. I would like to add that as you meet new people and make connections, try to find a mentor. It always helps to have someone with experience that can teach you and guide you in this business. You also may be able to shadow someone while they are training both to learn, and to get yourself known in the area. Some places may let you do a few free sessions so that is a thought as well.
Good luck to you!