Site structure advice

Hello, I hope I'm posting this is the appropriate forum.

I need some clear advice on how I should be building my site.

The site is a resturant directory/review site which lists resturants within a city and it's inner suburbs. Users can submit their own review of each resturant which at the moment is being forwarded to me via PHP/Mail.

So far, I have been building the site, using a template to give each resturant its own html page. However, as I go with the building, I'm starting to realise that it is getting quite 'bulky', and I'm starting to think about 'Searching' for resturants.

At the moment you can for example navigate to a 'Suburb1' page, which lists al lthe resturants in that suburb. The resturants are listed as html links, linking to the resturants designated html page.

I'm feeling already that this is getting quite a pain to update.

I've read some on ASP, and what I'm asking for really is some advice on how it could benefit my site stucture, and if people could point me in the right direction for resources that would be, (1) useful to me as a beginner, and (2) useful to my specfic site structure.

Your help would be massively appreciated, please say if I'm not being entirely clear.

Will