Moodle course sites are created unavailable to students. When you are ready to make your course available, open the course admin gear icon in the upper right corner and select Edit settings.
In the General options area, locate the field labeled Course visibility and use the pull-down menu to select Show. Scroll down and save changes.
Once your course has been made available, it will be displayed toward the top of your My courses list on your Moodle landing page.
If you are not ready to make your course available on the first day of class, it's a good idea to send students an email message letting them know. This will reduce the number of help desk calls significantly!