Dear Alex,
Thank you for contacting The Community Tool Box. We have tools for developing organizational structure. You might start with Chapter 9, Section 7 which provides guidance for Writing Bylaws. The entire chapter -- Sections 1 through 9 will likely be helpful for forming your organization. You might also look through Toolkit #15 to see if there is also useful information in there. Good luck with this initiative.
The Community Tool Box Advisor