There are two distinctive interfaces for projects in JIRA. The first interface is designed for everyday users, providing useful information on how the project is going with graphs and statistics, called Project Browser.
The second interface is designed for project administrators to control project configuration settings, such as permissions and workflows, called Project Administration.
Since you created your first project, the first interface you see will be Project Browser, we will start our discussion around this interface and then move on to the Project Administration interface.