That's right, neither the QCAR SDK or Unity can be used to create 3d content.
There are two choices when using the QCAR SDK:
1) Download the QCAR SDK, and use the Android SDK/NDK to write an Android application. You will write your code in Java and C/C++, and will use OpenGL ES to display 3d content. There is no standard importer/renderer for animated 3d models, so you will need to write your own or find a 3rd party library.
There are guides for using either approach on our website: https://ar.qualcomm.com/qdevnet/
See the "Get Started" section for help with the first option, and the "AR Extension for Unity 3" section for help with the second option.