Dani, with all due respect when I say this...you are trying to do something that is out of your league right now. It sounds like you are trying to setup a database schema(tables, data), build insert, update, select and delete queries on the data, and connect it to a website...and are trying to code this yourself without understanding what a database is.
My suggestions are:
1. find a web database programmer to help
2. spend time in a web development class or get the information from books...you have a fairly steep learning curve.
3. Use MS Frontpage, Macromedia Dreamweaver, other wizard based development tools to build the back end database...even this requires some level of database understanding.
Unfortunately as I said earlier web database programming has a fairly steep learning curve. Also, we all started where you are now...and the blood loss, hair pulling, frustration keeps coming...

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John