Adding fields

Hi am evaluating Zoho People as a potential application to manage our human resources.

I am missing several important fields and i was wondering if i can add more as i am doing on zoho CRM.

As an example we would really like to keep track of the personal skills like Language kowledge, computer knowledge, etc of every employ in order to rank people based on a certain criteria. is this possible?

on another note i would like to keep track of how many days an employ is not showing up to work for several reasons. where can i record this?

thank you