How do I start the process of spirituality *and* good health

Everyone has a different kind of spirituality. Some integrate the body and world along with the process. Some look to leave the body and world behind.

Given the nature of the question, we are talking about integrating body, mind, and world while giving enough attention to the body. Popular techniques of doing this include yoga, which is a complete system for development that begins with body and mind. The basics of all such practices are the four pillars of nutrition, movement, rest, and connection, listed in the blueprint for integrating.