Learn the art of jiu-jitsu in Gilbert Arizona.
It seems like most fights end-up on the ground so it would make sense to learn how to defend yourself from this position. If you are interested in learning self-defense, I would recommend the martial arts of jiujitsu.
Overall, Jiu-jitsu is about defending yourself, escaping bad positions, controlling your opponent & submitting your opponent. Jiu jitsu is not only a martial art but can be used for fitness/exercise. For example, try rolling around for 5 minutes with someone else and see how it feels. There are a variety of places/gyms that provide instruction in the City of Gilbert, so I would encourage you to try a few gyms and see which one fits your comfort level. Seems like prices range from $80 a month up to $150 a month (depending if a year contract or a monthly basis).