I've had luck using the Meetup app to find local groups and activities. I went on a really nice walk/city tour put on by my town's historical society, and there are lots of other walking/hiking groups I've seen lately.

Also, your situation sounds almost identical to mine and I'd love to get in touch if you're interested! I'm 22f, graduated college, moved to Essex county from the west coast last August, and don't have any friends/family in this part of the country. It doesn't sound like we're the closest geographically but my DMs are open regardless. :)