How to know which user group my user belongs to?

A simple question. I got an user credentials and logged-in and I am not able to get which type of user that one is (admin, something else...). I am also not managing   to find out how many users next to him that organization has?

I know it sounds simple but I have not much of experience with MS CRM (2011 in this case)  and am not managing to find this in help.

Thank you for the time