Website with printing on demand art (Prodigi)

[TeaSaltAndSpice]

Hello, I am working on setting up a new shopify store with my art. I want to use Prodigi app because they have a lot of possibilities with printing materials and work all over Europe. 

I want to promote my artprints on social media and aim for international sales. 

I want to include shipping in the main price, so ''NO'' extra shipping costs for the client. 

 What kind of Shopify subscription do I need to have as a minimum if I am making just one main store in English ?

Orders will go through the Prodigi app and they will deliver it to the clients. 

I am getting a bit confused with the 3 markets within the basic subscription. 

Thank you for answering. 

[TeaSaltAndSpice]

Thank you Sophia