I’ve watched some of his videos…and while his methods DO work as intended in his tutorials…it’s not always the most efficient, or sensible thing to do.
The way you are damaging the player is “wrong”.
By wrong, we mean that as _cDub has said, there’s already a way for the player to take damage, and it’s very efficient.
And like Devil showed you…that’s another way you could do it…but just like anything in Blueprints, there’s different ways to achieve something, you have to find out the way that it most efficient and easy for you. But you should be learning the right way…
So, sadly, I would say to forget about his tutorial and start to do it the “easy” way.