Welcome to the course. When you have enrolled in the course, and enter the course, you will see an outline of sections, lessons, and topics. You are in the first lesson. Select the first topic to continue. When you have completed each topic, then use the Mark Complete button to show you are done with that topic. Use menus or the next topic button to get to the next topic. Complete topics in order.
Once you have completed all topics in a lesson, go back to the lesson main page and mark the lesson completed. Then you can move on to the next lesson.