If you want to sell both products and images, here is how you can do that:
Use the Creator Plans to add an Online Store to your website to sell physical products/ digital downloads and services on your website.
Use the Client Galleries platform to sell images.
Using the Client Galleries platform you can create a public client album and add eCommerce enabled galleries in it. You can then add the link of the public client album to your main site navigation.
The public Client Album (for selling images) is a separate mini-site in itself and hence has a separate checkout and cart flow that covers the images added to that Client Album.
You can review all this in action here – https://nile.pixpa.com
You would see STORE link where the online store is enabled for selling physical goods and SELL IMAGES link where client galleries are used for selling images.