Move Hand Bone with Mouse In-Game

Hello! I am trying to replicate the results from this old post, but I am having issues with implementation. Currently the hand is sort of frozen in place when I click the left mouse button I believe I have identical blueprints to what’s in the post. After tinkering with it for a couple hours, I need a second opinion.

Link to old post:…-possible.html

I have a few screenshots of my blueprints here.