Help for Deep AR studio newbie.. how to do face tracking

Hello, I just started the studio project.

I import 3d models .fbx form and only need one face-tracking.
Like eyes blinking, mouth moving when talking.

I set Face.armesh - mesh driver : vertices - face.
and added lefteye, righteye, mouth as a child node.

I have trouble finding what mesh render should be used, or the hierarchy of the assets.
Somebody please help me!!