There’s a series on the Trivantis Community called Lectora 101. It briefly discusses the 20 top topics of learning how to use the product in video form. Each one lasting 6 minutes or less.
I also like to suggest that people take the quick tour. A 20 slide introduction to the interface.
The click and learn title is also a great example of tips and tricks on how to build a course from start to finish.
You’ll also find various articles and videos posted on the Trivantis Community that may be helpful. Just use the search feature and enter in a keyword like “variables”.
Last but not least for a cost you can attend training either via the web or on site.