Set Each Grid to new Product

Hi, I need some help with my e-commerce site. As you see below, I need to set each square to a different product. I don’t know if I need to be using a different page type. I think I may be on the individual product page.

I also, need to be able to move and style the drop-down menu for the size.

I know it’s not how you are supposed to build this, but this is where I am. A lot of these tutorials whip right past a lot of specifics. I know I’m supposed to build a product list page, and then a page for each product. I can’t figure out how to do that.

I really just need each product and size to work.

Here is my site Read-Only: