More measures and dimensions can be added via the measures property panel or by dragging and dropping measures / dimensions / fields from the field lists or master items - on top of the pivot table chart object.
Have you seen these videos - I am not sure if you can view them where you are located (office firewall / country restrictions) - but they will show you this process:
from this video index: New to Qlik Sense Videos
In the above video index you will find many informative videos that will help get you started:
This one Understanding the Master Calendar (video) - will show you more about date functions.
Let us know how you do.
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