Install QT Creator with all options. Then you will have a lot of sample projects on your local installation, also a help of all classes in QT Class Library.
If you start a new project (use QT Mobile) QT Creator will generate a running hello-world-app.
You may choose simulator first, real mobile is for starters hard to set up.
The most important QT Classes are:
- QApplication
- QMainWindow (main window/GUI in any QT App)
- QWidget (it is used for all GUI elements, like labels, buttons ...)
You can search for this classes also in Google and then you will get a bunch of help.
Type in Google also questions like "How to change background color QWidget" - choose the favorite site "
www.developer.nokia.com" and here you will find all answers including simple example codes.
Try this, and after learing how to generate an app, you are ready to install your device - then ask again.
Stefan