Click on the + Add a section button.
This will create a new section for you to add content to:

You've already added an introduction; now you can dive into the learning material.
Look again at your learning outcomes. The first learning outcome can be explored in the first section.
Click on the pencil icon next to the 'New section' heading and change it to something more appropriate. You could start with 'Section 1:', followed by the topic that's addressed in the first learning outcome.
This is a heading, not a sentence – there's no need to write the learning outcome in full as the title.
Press the Enter key to confirm the heading you want to use.
Now you're ready to add some content.