Being an admin

[CE] is there a class, webinar or someone that could help me out. I'm new at being admin for our team (the last guy retired) I don't know a lot about being Admin. I'm trying to figure stuff out, but I think I'm confusing myself more.

Some things are: how to update Connect Edition from 9 to 11?, How to make it so the team can not update there connect edition? and any other admin stuff I don't even know about.