Forum Moderators: coopster
As far as knowing nothing of PHP/MySQL, if you aren't willing to learn everything you need to know about securing your website with the techniques outlines in the thread above, you might want to have someone who is experienced take a quick look at what you come up with given that this system is going to be securing a certain section of your website. You wouldn't want anything to be compromised.
But if you're up for the challenge, we're here to help you every step of the way :)