You may have a larger problem.
WordPress.com does not enable ecommerce here, and while artists and designers and authors are welcome to blog here and sell their books, clothes and art, reselling, ie selling things you, yourself, do not make, is banned. Even if you make the product yourself in your own factory, it may not be allowed. Before you put too much effort into it, you should contact staff via your dashboard Help button and ask them for the all-clear.
To create this page you're talking about, you can make it a sub-page of an existing page, and then NOT have your pages widget show hierarchy.