Go to your local animal shelter and volunteer to walk the dogs. Take a Continuing Ed class in something that interests you. Be friendly/start up a conversation when you fill up your gas tank, when you’re at the 7-11, grocery store, etc. If you like to hike, walk, birdwatch or whatever there’s often group meet-ups organized online. Pick a point on the Appalachian trail and do “trail magic” for the day. Join a gym.