SCP-Like Interaction System

Hey! Right, I am currently recreating one of my favourite horror games of all time, SCP: Containment Breach. It has gone great for a while now until i’ve had to come to the interaction system. I have tried using many interaction plugins but none helped, ive looked for many forum posts, reddit posts and youtube tutorials but have found nothing. In the game you can interact with anything even if you’re not looking at it but you still need to stand near the intractable. Would anyone know how I would go around doing this?