What modules do I need to setup an Etsy type store?

Hi, I recently purchased marektpress, the $19.00 plan which i thought included support. It doesn’t seem i’m allowed to log into the support section however. I am not a developer, but just tryig to get something barebones setup so i can see the funtionality of the solution. The developer i’m having set this up is now telling me i need to purchase maretpress frontend to make this work? Is this correct? Please help, is there anyone available for hire that could even do this for me. THANKS!