You can always try TKD, it gives people good workouts. You dont have to be flexible to take TKD, they will train you until you get more flexible. From what I heard. Check out the class, if its amazing then maybe the price is worth it... If not then you can always try finding something else close to your home and that fits into your time.. Or, buying dumbdells and do jump roping at spare time. I hope this helped