I need help designing my database for my knowledge base on my website. I need a way to store the following:

ID
Title
Body
Author
Primary Category
Sub Category
Pictures

Can you store pictures in a MySQL database and if so, how do you retreive them for use? Also, how should I setup the primary and sub categories? Just as text? Since I want this database searchable, should I make everything but ID and Pictures full text? I'm still new at this. I got a book but it sucks