Ask about the cost. Some programs are paid in advance while some are paid as you go along. Ask about free lessons. Bring some friends along and maybe you will convince them to take lessons along with you. Ask whether your children can take lessons.
Square dancing is a wonderful family activity.
Ask what level you will be able to dance at after you have completed. Ask which area clubs dance at this level. Ask about student dances. These dances give you a chance to practice while you are still a student. The more you get to practice, the easier dancing will become.