Introduce yourself and your course to your students.
Using your course site, introduce yourself and your course to your students. It is preferable to do this using some kind of media: a video introduction, a narrated PowerPoint (using Panopto is a good choice), a screencast...something besides text. You might use this as a chance to practice with a technology you plan to use for your lectures.
Make this available in your course in the place(s) it makes sense. This could be on your Home/Welcome page, on the Syllabus page, or in an appropriate module page.