Welcome @Pviegas 
Found a few external resources that use TensorFlow that you might find helpful:

Realtime Face Emotion Recognition | Tensorflow | Transfer Learning | Python | Train your own Images - YouTube 3


This video contains stepwise implementation for training dataset of “Face Emotion Recognition or Facial Expression Recognition” using Transfer Learning in Tensorflow-Keras API
(00:00:00) concepts
(00:23:01) installation
(00:30:52) implementation
(1:15:08) Live Webcame demo


medium.com/analytics-vidhya: Realtime Face Emotion Recognition using transfer learning in TensorFlow 1