Being a spiritual leader can be a very difficult calling that requires great sacrifice and dedication.

But, there are many ways for a person to develop and express their spirituality without being a spiritual leader or forcing their beliefs on others. Let me suggest that you draw a manga with a spiritual theme. This would be an exploration and expression unique to you, that no one else can do, and others are then free to get what they want from your manga, or even just to enjoy the artwork. This gives you free expression of your art and your spirituality, and leaves others free too.