So I have a monorail that moves along a spline and what I want is for when a player enters a collision box they can hit E to make it move. All the tutorials I’ve watched have not helped.

essentially what you want to do is impliment an interaction interface on this actor, and call the start event you have posted above from it.

From the player class. On input event “E”, get overlapping actors> for each>“does impliment interface”> call interact event from the interface.

What i like about the interface feature in the engine, is if you leave it bare bones, it can be used to call or trigger different functionalities from various classes its assigned to. You also can include variables being passed and functionalites in the interface function but that tends to get a little complicated.