You are not too old for it. Insanity is a very difficult workout, the point is to give it your all and each time try to push yourself a little further each time. You pressed play so you are well on your way . Good luck and no worries you can and you will get through it! Pump yourself up, you know the saying "you believe it you can achieve it"! Believe in yourself and pres play everyday and before you know it you will be stopping less.