Frankly, I suggest dropping traditional martial arts and just go for something that has proved its efficiency. Boxing, kickboxing, judo, wrestling, BJJ or something similar (anything you see in MMA). Or just do straight Tai Chi. The whole ''toughening up the body'' you see in some martial arts like Kung Fu is either terrible on the long term for your joints/body, or, best case scenario, is simply ineffective.
I always loved Joe Rogan's comment on Tae Kwon Do after he got beat up by a friend who did kickboxing: ''At that moment I realized I had become really good at something stupid''.
I'm not saying to drop it if it makes you happy. I'm just saying that if you do it, don't expect it to be useful.