Have jumped in just to say hello

I'm starting to work on the new www application... this is my first "serious" one which is to be set up on the net and have many visitors :P But it seems developing databases is my weakest point in the proccess as I used to do rather other things. That's why I'm here I've got a strong desire to learn a lot in the field.. and so I hope to get some useful tips from more expierienced folks