Newbie looking for resource

Hi,

I just started with Squarespace a couple of weeks ago. It was very easy to get a simple template online but I am wondering if there is a course or tutorial that would help me understand how to set up the following.

Photography web site.

User click "Gallery" to see available categories of images 

Then they click a gallery and a list of images appear within that gallety (like seascapes)

When they click image the full image is displayed with an option to make selection of frame type and size and add to cart

Finally, what I need to do to set up the commerce side at accept a payment.

Thanks