To create a new QML Project in the Qt Creator IDE, select "File -> New ..." and under "Applications" select "Qt Quick-Application". After clicking "select" you can now name and set the path for this project. After hitting "next" you can select which components you want to use, if unsure just leave the default and click on "next". The two next steps will allow you to setup up a Kit and Source Control if you want to, otherwise keep the default settings.
You now have created a simple and ready to use QML application.