How to damage another player in multiplayer with an actor sphere?

Hello everyone, I am working on a multiplayer game and I followed a tutorial on how to cause damage with line trace but I changed it so the character fires a sphere projectile with the spawn actor node , I made an actor blueprint and added a sphere component, but I can’t seem to figure out how to apply damage or have the sphere collide with another player on the server, I’ve tried sphere overlap, writing the blueprint in the character and projectile actor blueprint but nothing seems to register with it, the picture is as far as I got with it in the actor blueprint, I’m not sure what goes before apply damage