How to make a custom BP for a camera shake that overshoots your camera based on your keyframes

Hi,

I want to create a BP_CameraShake that takes into account your current keyframes and overshoots the camera rotation or translation to create a lag. I have created a custom camera shake BP under the camerashakebase but I dont know how to make a custom event to start fetching the keyframe information for the camera. Is there anyone that can point me in the right direction or has an example I can replicate? Thanks!