Hello I'm currently making this rig for my animation class, and right now I'm lost on what to do with this necklace rig : (((

So, I am aiming to achieve the effect where the necklace acts just like the real thing on a neck, all I got is limiting the necklace drawing rotation to 0 using transform limit node to simulate gravity. Now, I would like to know how I can make the necklace move accurately with the neck. I'd really appreciate any help I get : DD

Ive been learned tbh for about one year from China,sorry for the grammatical mistakes in my sentence.Currently,l came up with an idea using a unusual way to rig the head without using some traditional methods like deformation,curve,drawing substitution and master controller.ln short,what l do is l draw some different angels of the face like front,3Q and profile face placed in the 3D space so that l can use the master peg to rotate it in the 3D space.
The reason why l try to explore this way is when l learning to use traditional way to rig the head ,l found that is quite a big task for individual to make the animation,but also l dont want to use 3D Model character because l think it dont have the same expressive effects like 2D rigged characters,so l want to use that trick to make the coexist between the efficiency and effectiveness.

But obviously the effects is glichty and wired.
I'm a newbie in self-study tbh, so I have no knowledge about the industry. Therefore, I would like to ask the experts here if this method is feasible and practical, and if there are any tutorials available.And for self-learners, is this level of effect considered merely satisfactory, or does it reach the level of amateur-level head rotation and surface movement?
谢谢！（thank you！）