Chapter 5 of the Constitution will give you a few landmarks... You may also refer to the Holacracy Book.
- The LL of the GCC is appointed by the LL of the anchor circle (or, if any LL, by the anchor circle through an IDM process decision).
- Up to you to create the Anchor Circle from the existing board. Each member will have to ratify the constitution.
- Actually, your questions sound to be... tensions. Seems you need to build the proper apps to fit your needs.
Hope that helps,