GUI noob - no prior experience with Qt or Rqt

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• Problem Statement:

I have a USB camera stream and I can view these images multiple ways. But now, I have to create a GUI with say an image window that is streaming these images on a node "Listener.py" and has some control options available to the user.

• Example Scenario:

I can see three buttons, and I need to do this :

   onClick(Button1): Display Image1 on ImageWindow
   onClick(Button2): Display Image2 on ImageWindow
   onClick(Button3): Display Image3 on ImageWindow

How do I go about creating this GUI? I don't need an exclusive code, but any/all links to well-documented tutorials is terribly appreciated. I actually went over to rqt/tutorials page but found it a little overwhelming.

Posting here in the hope that I get out of noob status and other noobs can benefit from constructive answers as well.