Hi Helena,
You need to register/log in here:
Once logged in you'll find the "Teaching with Moodle, an introduction" course:
http://learn.moodle.net/course/view.php?id=2
In the main section (left area) of the course you'll see the different links for each activity:
Overview of this course and FAQ
Course noticeboard
Forum: Questions and answers
Forum: Share your good ideas
Forum: Introduce yourself!
etc.