The job of a friend is not to decide what should be done, not to run interference or pick up the slack. The job of a friend is to understand, and to supply energy and hope, and in doing so to keep those they value on their feet a little longer, so that they can fight another round and grow strong in themselves.
Focus on creating really good music and a great live show before doing anything else. If you have these two things in place, the other aspects of the business are much easier and almost take care of themselves.