How to make an entity interact with player (though animation) (geckolib)

So i want to add npcs that the player can shake hands with after some dialouge through chat, how can i do this?

i know theirs a way to do it like

add a players model and then rip the skin and then put the texture onto the player model and hide the real player and not make them able to be moved.

but if that is possible how would i do that?