I'm sorry if this is a stupid question. Its Just I wanted to study Ninjutsu 10 years ago, but put it off (a lot of turmoil in my life). I am getting older, but I feel that I may need better self protection, and safety. I've always had a fascination with becoming a ninja, but my body is not well conditioned. Are there posts about a ninjas nutrition, what is the average cost generally to take courses in a dojo for Ninjutsu? Anyone know?