Final answer:
Activate the Edit Mode by clicking the 'Edit page' button in the user bar, add content to the suggested structure, and remember to save your changes.
Step-by-step explanation:
To activate the Edit Mode you want to work in, you will need to locate and click the Edit page button which is typically found in your user bar. Once this button has been clicked, the platform will usually present to you a suggested structure for your content, providing a framework within which to place your material. After populating the page with your content, be sure to save your changes by clicking on the 'Save' option to ensure your work is not lost.