3D sitting woman model and lip sync with video/audio input

I want to replace human client with a 3D model sitting in chair for interview and have the audio of the interview in different voices (mine and the client, both female) using a video input. The purpose is so I can teach interviewing on youtube with real client interviews with complete anonymity for the client and myself. The movement will require face, eye, arm and upper body movement while consistently sitting in a chair. I am a retired person and have skill in analyzing interviews with two audio inputs. Only the client will be seen on the video. I have a consistent regular income from the government and have a meagre living standard and spend all my time in front of computer but insufficient skill to learn the process. I am only interested in the final product of anonymity for authentic interviews and analysis. Then I can create an effective youtube channel offering real interviews and analysis. I would like to start with an attractive female young Chinese woman dressed in casual attire as the interview subject. As my income increases I will require different models for variety.