first of all a hearty welcome to the Qlik Community.
At first i would do all the Tutorials found here New to Qlik Sense Videos.
There is also a pretty good (but not yet finished) living tutorial on Qlik Branch.
Also on the Qlik Help Site https://help.qlik.com/sense/2.1/en-US/online/ are some tutorial (left bottom) which are pretty good explained.
Hope this helps you further more.
I think the best way to learn more is just to see what you would do with Qlik Sense (in your Job or where ever you'll use it) and try to just use it. In my opinion Qlik is all about learning by doing