How can i interact with Mesh Emitter

Hail Masters of UE4!

I am struggling over here and I think its because im a newbie! Essentially trying to emit meshes that when I collide with them in 3rd person (or with my arms in 1st person view), they make my character emit particles where the body collides with the meshes… simple enough to explain but for the life of me I can not find any tutorials or anything that can help me with this! Deadlines are coming up now and im still stuck!

Please please please help!

Im a newbie so please assume that my knowledge is very limited!

Thank you all!