How to add a simple page of text
Step 1. Click on "Create Content"
Step 2. Select "page" content type
Step 3. Add a title
Step 4. Select a category (categories and sub-categories are called "taxonomies" in Drupal). For example, if it's a news item you are creating, select the 'News' term in the Site taxonomy.
Step 5. Add text!
Step 6. (Optional) Click on the plus/image icon immediately below the text entry box to Add An Image.
Step 7. (Optional) Add a file like to upload, like a PDF.