face capture for facial expression only

Hi

i am very new to character Animate. I think my puppet is almost done. One final issue i am having is the face capture. i want it to just catch my expression and not my head movelments.
I will be using it for lve streaming and i can't sit in a static postion.

I have tried adding some fixed tags to the body and head but the just causes warping when i move to much

Can i change the camera capture settings so that it doesnt move the puppets head?