I guess you'd like to create your own accounts/items.
Once you've entered your master password you're in an edit field.
Press the tab key once to find the "new object" button.
Then press the space bar to bring up a menu from which you can
select the type of item you want and press Enter on it.
Depending on what type of object you've selected you are presented
different kind of fields to store information.
When done, press Ctrl+s to save.