You may also want to take a look into some business intelligence knowledge as well, to get a better understand of what Qlik Sense does and why it's used. That'll help you when you upload data to the hub and begin to make your own applications - it will also further your knowledge as a business and data analyst.
Do you mind me asking what your current goal with Qlik Sense is? Are you just exploring as a segue into being a BI practictioner. Or did your current BI team all share a bad batch of sushi, and you will have to take over until their health issues are resolved?
There is a lot you can do with it, but I find that more and more of it depends on the goals of the organization that you are a part of, as that determines everything that you can do, and will do.