in the Character when you do your kick
trigger the line trace and determine if the hit actor is the door.
if it is the door then decrease the Health of the Door
If you want it to then have a damaged appearance either apply a decal, swap the material/texture, or change the model to a more broken form (this can be accomplished by either storing all the meshes on the DoorActor, or by fully swapping the Actor as needed)
then when the Health of the door is zero or less either replace the current mesh with the Broken_Door, and play the animation, or use the Nanite fractured door to have Unreal’s physics system take care of it (this would maybe require giving the object an impulse based on the location of the Hit, normal to the point of impact which is all going to be in the Hit Data from the line trace)