If I can do, you can do. Every journey begins with a single step.
All across America, we have very good martial arts gyms to begin learning the craft, and lots of variety in the styles. Find one that fits you! If you're having trouble picking out an art that will fit your style, take the Bruce Lee approach. He said you should consider drawing a wheel on a piece of paper, and like the spokes of a bicycle wheel, use lines from the center of the circle outwards as descriptors of yourself. If you're fast, a longer line, but if you're not fast, a shorter one. If you're strong, a longer line than if you were weak. Accuracy, speed, cardio, etc.--all of it should be on a line with an honest feelings from yourself of how you compare. Then decide where you are weakest, and work on that part of the wheel. If you feel you are slow, study Tae Kwon Do to work on your speed. If you feel like your cardio is bad, or you're not strong, Muay Thai is the way to go. If you feel like you can take people down just fine, but you don't know what to do when you're there, learn jiu jitsu. If you love to fight on the ground, but don't know how to get them there, focus on Judo. If you want to work on your balance and evasive abilities, learn boxing.
Martial arts are not hard, but they involve hard work. They require dedication, instill discipline, and make you a better person. They keep you in shape, and training regularly can keep you safe. There is no reason not to begin making the first steps on your journey.