fidelis

Hi, I am new to PHP and want to design a web based application, basically type of accounting one so that data can be stored in a particular single location. I would need to use mysql for db. Please help me to understand how long can it take to design a basic structure and also the things which i need to have and learn. I have installed wampserver and netbeans. Any source to understand how things should be designed would be appreciated. Thanks in advance and please post for any queary as I am unknown to web application design but eager to design something....