First person template - adding hit sound to sphere projectile and monitoring impact velocity

Hi guys,

I am trying to achieve a simple design but I am new to Unreal. I would like to add a hit sound everytime the sphere being shot by the gun hits the wall or cube. I want to be a bit more complex adding different types of hit sounds (Light, Medium, Heavy) depending on on hard it is impacting on the surface.

I am using 3 fmod sound events (one for light, one for medium and one for heavy hits) and to achieve it I will need to monitor some velocity impacts values in order to play to correct hitting sound. Although I have no idea on how to structure the blue print in order to achieve this. Will some of you guys have any ideas to help me?