Do you mean on writing bylaws? You might start by appointing a small committee, say three people, to research other groups' bylaws, then recommend ones that would work for your group. I'd have the executive board edit/modify the proposal as needed, then present it to a general meeting to be adopted. We have a helpful story called How To Write PTO Bylaws that walks you through the process and offers plenty of resource links. If you're referring to starting up a new PTO, the story How To Start a PTO details the practical steps.
Links in this post:
How To Write PTO Bylaws: https:/www.ptotoday.com//pto-today-articles/article/968-how-to-write-pto-bylaws
How To Start a PTO: https:/www.ptotoday.com//pto-today-articles/article/837-how-to-start-a-pto