If you add material to a hidden section later, you can always enable the button. See the question below for my ideas on one way to use the sections. Disable those sections that you are not going to use. Determine how you are going to organize your course documents. Since, in the current version of the software, you cannot move items between or into folders once the item is created, you want to have things organized from the beginning.
Most people use topics or dates to organize the information.
That is, some people create a folder for each chapter and some people create a folder for each week. Disable the ones that you are not going to use. Then make an announcement telling them to introduce themselves by telling why they are taking the course, or some such, in the discussion area. Turn on enrollment. CourseInfo is extremely easy to use, so it is hoped that faculty will be able to do most all of the work with their courses themselves.