I'm building a site that is mainly e-commerce (well converting) and I want to be able to have an area of the page that will show products(with images) depending on what the visitor clicks. (I don't mind if its random products, but it would be cool if I could select what they were). I'm not experienced with PHP at all. In my head, I know what it has to be, and I think I've figured out how to layout the page correctly (CSS, then inserting PHP functions in the divs).

But I don't know how I would be able to add content to that specific area. I was hoping to find a module that would allow me to have several sections on a page (its gonna be on all the pages, not just one). Or it may already exist, but I don't know how to do it (this is like my second day with Drupal).