If you're looking for an organization, there are several that are accepting new people. Notable are the St. Francis Aid club if you are looking to aid others by tending to their wounds, and the Arts and Crafts club and Cooking club, which each focus on martial elements but have differing goals. There is also the History club, but I do not know what their mission currently is.

What skills and abilities do you have? That may determine where you are best suited.