Use an Instagram-specific site container to isolate your activity from your normal browsing. Imo this is really the only thing that matters that doesn’t have to do with your self control. You want to make sure Meta gets nothing from cross-site tracking and containerizing IG should do that. Also, don’t visit links to and from IG. Look it up manually through IG search.
What does “let him try and find the hard drive” really mean? Does he just want access to the landfill or is he expecting some kind of cooperation with the workers? How disruptive is he going to be?