In a Topic Based Course it is easy to manage your course content so that it does not scroll down and down and down (Scroll of Death).
Moodle creates a navigation menu based on your topics. Clicking on the link takes you to your topic. Moodle automatically use the Topic Heading to create the menu as you can see with Topic 8.
One More Thought
If you like hiding courses from students and do not want the students to see the course not available block.
Make Sections Invisible To Students
Go to Settings then Edit settings and select Hidden sections are completely invisible.
Hidden sections are not visible in the Navigation System in a student view. As you can see above after I made Topic 8 and Statistics invisible. They are visible and a light grey color in the teacher view.