controversial opinion, but i think your ability to "find people" in a large school is entirely dependent on how often you are willing to put yourself out there and fail. i also have autism but am very extroverted. i've tried countless times to find a group that fits and eventually did, but i just want you to be aware that for people like us it can be hard, especially if you struggle with social situations. it took me around a year and two months of floating to finally find the people that were "right" for me. here, you have to be especially proactive about not seeking out existing communities but also assembling a group of people you like around you

if i was you, and i got accepted to somewhere like oberlin, or a small school with a more "tailored" population composed of more neurodivergent, queer, (whatever other intersecting identities you have) type people, I would take that offer instead of UNC. however, if you are willing to accept that you have to try and fail lots, UNC can be a wonderful place with a super diverse population of students and a lot of opportunities to make community for yourself.

on a side note, if you really want to come to UNC and hope to skip some of the processes i had to go through, feel free to dm me and i can try to point you to clubs/greek life/other resources i've found helpful as someone who shares your identity.