If you are new to Qlik (View/Sense) - but an experienced programmer - just start with scripts for the book: "Qlikview your business".
See reference below.
The scripts start from the simple to more advanced.
The scripts to NOT require: 1) Any registration 2) Any licensing (for Qlik) 3) Any purchase of a (any) book
This is a mighty generous of Wiley (publishing house) to put the scripts into common access!
A lot of techniques are shown in the scripts (mostly work with variables, preceeding load, joining, analytical flags, usage of the SET expressions, simple calendar example etc).