By default, Shopbay.org will create a shop named "My First Shop" for each merchant account user in Shopbay.org. You should be able to access your first shop when you first login to merchant portal.
Click Enter My First Shop to proceed.
Choose the Free package to complete the creation of your shop.
Congrats! At this step, your new shop is ready to go. However, there are some stuff that you need to prepare first so that they will become handy when you setup your shop later.