Can I use my existing portfolio/gallery (project pages) as my commerce store without starting over?

I have an existing gallery/portfolio that has collections of photographs I want to sell. They were created as projects within the page. Is there a way to sell prints right from the gallery/portfolio I already have set up without having to start over and create a separate store page? It is already formatted in the exact way I would like the store displayed. I want to add the commerce functions right on the existing gallery/portfolio. Is this possible?

You will need to set up the products, but you may be able to use product block on each of the gallery pages to allow purchasing from there rather than directing to a store page. You may also want to enable the direct to cart feature when clicking purchase.