Hi Peter,
As far as I know, the free DJ course hasn’t been available for quite a while now. Rumor has it that there is something in the making that will replace that shortly, but don’t pin me down on it.
I took the course, years ago, and while interesting, if you want to kickstart your DJ-ing, you might want to check out the How To Digital DJ Fast course. It’s a paid course, but good value for money. It will help you get your bearings in a couple of weeks and help you find the right things and the right way to practice. It also comes with a money back guarantee I think, so if you don’t like it, it’s a no questions asked money back. Read the appropriate page (well watch the video actually) for more information.
http://www.digitaldjtips.com/how-to-dj-training-courses/digital-dj-fast/