Unfortunately, I'm not able to discuss my process for the rigging because I don't have time to go into detail, but I can briefly discuss what I did for the rig and show some screenshots. I bought a course from the FlippedNormals website that Discussed face rigging and went into great detail. I had followed and completed the course to get this:
Bibliography
FlippedNormals. 2020. Face Rigging for Beginners | FlippedNormals. [online] Available at: <https://flippednormals.com/downloads/face-rigging-for-beginners/> [Accessed 26 February 2021].