Click on ‘Choose Course’ from the Main Menu to see the other available courses. To select one of them, click on its name.
Once you have selected a new course, you will see a list of the lessons available in the course you have just selected. Click on any lesson to start it, preferably the first one in the list.
Once you have selected a course, whenever you click on ‘Choose Lesson’ from the course menu, it will only list the lessons in the course you have currently selected. If you want to switch to another course then click on ‘Choose Course’ again from the main menu.
When you complete a lesson, you will see a ‘Next Lesson’ button at the bottom of the screen. By clicking this, you will move to the next lesson in sequence for the course you are currently using.

