Documents & videos about Qlik Sense.
when you read an interesting blog here or other forums you may would like to test it.
But you not always have proper data to challenge your skills and theories.
Recently, I re-read hic blog about canonical date (https://community.qlik.com/blogs/qlikviewdesignblog/2014/02/17/canonical-date)
and for that I created a data model.
Since the topic (Sales Orders ) is really a frequent subject which can be analyzed, others also could find it useful.
Best and fill free to modify based on your need,