At this point in the hour, I think you have the tools to create basic text to suit your project. Once you've finished creating your text, select File, Save As and then select a location—your “scratch disk” is a logical choice. Give it a descriptive name and then click Save.
Once your text is saved, you can always reedit it. If you create a unique text and graphic style that you think will help viewers recognize your productions or give them some consistency, you can simply change the wording in saved text files while retaining the style. This comes in very handy if you've created a standard way to “super” locations or interviewees' names.