I have made a quick project that I believe will help with learning about networking in UE4.
It’s fairly simple game where you have a ball you can roll around with physics, you can change the color of the ball with C, control with WASD and scale and zoom with mouse wheel.
Teaches you how to setup camera controls, apply input and force to a physics enabled pawn and then replicate that to the server without using the built in replicated movement.
The movement and scale is handled client-side so even with 500 ping it will be smooth and instant for local player.
Everything is basically in the BoxPawn.
Hope it helps someone!