i assume that your working in the level bp since its a trigger volume. in that case you would create a input event which uses the E key. then you would use the is overlapping actor node and a branch node. this combo will control if the rest of the script should run based on whether the overlap is true. now for the target and other pins you would have a reference to the trigger volume in one and a reference to the character in the other. you can use this same script for both your E and F events by simply changing the input event node.