Need help with physical bones

Godot Version

4.4.1 stable

Question

So I have imported a simple hat model from blender to godot that has a simple bone structure.

Now I want the tail to move around using physics. So I tried to create a physical skeleton but unfortunately I have no idea what I am doing and it just ended up creating a gigantic mess of collision shapes.
Can anyone explain how one can setup a PhysicalBone3D to have a part of the model be affected by physics?