After the initial login is completed, you will be presented with your xTupleCommerce OS setup information. Note this information and copy it to a safe place. After continuing from this more setup will continue until you are presented with xTupleCommerce configuration options. You can update this data or use the default information. Again, be sure to copy this information to a safe place.
As more code and setup are configured, you'll eventually arrive at a "Service postgresql restarted successfully" message.