Install and open VTube Studio
Allow camera and microphone permissions if prompted
Connect your webcam to your computer
Open VTube Studio settings
Go to the Camera or Tracking section
Select your webcam from the camera device list
Adjust resolution and frame rate if needed
Enable face tracking or webcam tracking
Position yourself in front of the webcam
Check that your face is detected in the preview
Calibrate tracking if available
Save the settings
Keep VTube Studio running while using the webcam
Close other apps that may be using the webcam if it is not detected