Zanikia, you do still have options. It is not exactly what you want, but you could study Japanese history, and learn the details of their late feudal system -- that is the era of the Samurai. The most dramatized era is near the end of Japanese fuedalism, when things were falling apart.
You could learn the Bushido code, and study Japanese martial arts, both armed and unarmed. It is steeped in Shinto, the most popular religion in Japan before Buddhism was adopted. Both continued to exist, separate and together, and still do.
At the very least, the spiritual aspects are worth while for finding your own path, and the history lessons and physical training can be beneficial.
But you are best with the martial arts to take actual training. Doing it on your own may end up injuring you.