https://flippednormals.com/product/face-rigging-for-beginners-5063

In Face Rigging for Beginners, you'll learn how to create a simple yet fully functional face rig using only joints in Maya - which will also work for real-time and game engines. You'll be guided through everything in real-time, from the initial joint setup of the face, weight painting to finalizing the rig. Learn how to create the main rig structure, mouth setup, rigging eyes, eyebrows, and more!  By the end of this course, you will be able to create your own simple yet effective face rig and have a solid understanding of how the rigging process works when using joints. Rigging for Beginners is perfect for students who are already familiar with Maya, but who are new to rigging. What you learn will serve as a foundation for when you're getting into advanced face rigging for production.