Door's open with mouse

Hey all, I know this has been asked a few times before and I’ve been attempting to get this to work for the last 3 days. I’m essentially trying to re-create Amnesia’s door controllers in Unreal and am having a lot of difficulty with it. I have been following a tutorial from The Undead Dev and watched a few on YouTube’s but there aren’t really that many and none of them were what I was looking for. The problem with The Undead Dev’s tutorial was that it was purely screenshots and some text, and being a complete newbie to the engine I have absolutely no idea some of the nodes are and what he’s talking about so I was hoping for some help here. If anyone could explain to me like i’m 5 how to get this working or knows of a video tutorial on this i’d much appreciate it. Thanks for reading