Bone Rigging & Mouth Sinking

So I have toon boom harmony essentials and I don’t know how to bone rig 2d animated characters and mouth sink. Please help and thx if you did.

This youtube channel has plenty of rigging information, the problem is that most of them use Premium, however, there’s a lot of information there that should be useful to Essentials users.

There are also webinars specialized in creating rigs with essentials, this one is pretty recent: