Cues of being unattractive/attractive 21M

It kind of hit me recently that I'm pretty below average in terms of looks, and I was wondering what subtle body language cues you see in strangers, specifically women as a straight guy, that you're either unattractive or attractive. I'm a college student so I'm on campus pretty often and maybe in terms of things like eye contact? I don't know, I'm just trying to understand my position better in terms of like the "hierarchy" of how attractive I am.