How & where to Log in as administrator & performance appraisal issue?

How & where to Log in as administrator & performance appraisal issue?

Hi
I'm a new user and would you guide me how & where to log in as Administrator? since I want to set up the performance appraisal. As I found your website information about performance module include  Skill Set Goals Feedback , Self Appraisal  and  My Ratings; did all the things default in system or I need to set up by myself? thanks!

Hannah