Help with changing models - Multiplayer

Hello, I am creating an fps game, and I would like to do that the player only moves the hand model, while the rest of the players see the full character model. I want to avoid problems with the camera right now, e.g. penetration through models or a player who is looking at his legs … not to mention animations that are probably not possible to make them not look bad,
because it is known that it is easier to animate 2 hands and a weapon that can be moved away and closer, and the player will not notice the difference, and even it will seem natural