Single/Multiplayer, Touch & Vive blueprint only Template

Hi ! One help please.

I’m doing a shooting game, in the place of the hands I put a skeletalmesh(gun) with the projectile.

However when changing the weapon on the player (client) the weapon is not replicated on the server.

Also when receiving damage, the player (client)

I have no experience in multiplayer games.

Can you help me with this?
Tank´s Tiago