Now that you have logged in to ZenCart's administration panel, you can start configuring it to fit your needs.
We will start with changing the name of the shop. Please go to the top menu and hover over Configuration. From the list that appears, select My Store (the top entry).
A list of attributes will appear. Select Store name and the Edit button will appear to the right.
Click that, change the shop name and use the Update button below in order to save your changes.
Those will be active immediately!
The rest of the options of the store can be configured in exactly the same way.