Creating a society

[Run4TheHills321]

In my campaign, my sorcerer died due to some unfortunate wild magic rolling during a tough dragon fight, so I am making a lvl 6 wizard. I went with the sage background, but my DM waned me to make up a reason that he is lvl 6. And why he came to the area. I opted to go with being a member of a secret society. In essence, it's a society concerned with the conservation of society. The inner council is a group of powerful men and women that meet every 10 years and in times of crisis. They send out field agents, and that's what I would be. What I need is a list of things that I need to describe to make this doable. So far I have:
Hierarchy
Operation procedure
Rules/punishment
Recruitment/initiation
I know I have forgotten some things, I just don't know what. If you have an idea I would appreciate the feedback.