This is normal, it just means you don't have any new mail waiting for you. From here you can send mail or access your local Active.mbox folder. Pine has several different screens. Some examples are the Folder Index screen, the Compose Message screen, the Help screen, the Folder List screen and the Main Menu screen. Different screens have different commands that you can use.
Every screen has the following conventions.
The top line is Pine's information line. The third line from the bottom is used for user input and status messages. The bottom two lines are always used to list the commands you can give for the current screen. You press the key that is highlighted to execute a command. You should always examine the command lines and other commands to see what commands are available to you on each screen.