Help needed

Hi, I am completely new to PHP and would need some help. I have just opened a site for my manufaturing business and would like to create a section where each of my clients get their own account in which they can login and check the status of their order. For this I would need a script for accounts (SQL, I guess?) and also a script for updating the status page of each order. I do want something like an admin area since there are several of us who would update the pages. Basically I just want to have diffeent fields with information which are easily updated but for different accounts/clients. Is there somewhere I can read up on how to make such a thing or do I need to hire someone to do this???? Thanks, Christian