here is a tutorial I found https://www.youtube.com/watch?v=iPfU1SmzkkY for doing a sword, but it can be adapted to Kicking/punching (you would just be modifying the Skeletal Mesh of your Pawn/Character instead of the weapon)
here is a tutorial I found https://www.youtube.com/watch?v=iPfU1SmzkkY for doing a sword, but it can be adapted to Kicking/punching (you would just be modifying the Skeletal Mesh of your Pawn/Character instead of the weapon)