Social groups abound. Making the right selection for ourselves is the biggest problem. We are all a little reticent to go along a couple of times and find that the group is actually not for us. Research and feedback from friends is helpful. If we have a friend in a group that may be the first one to try out. At the very least we have one friend there.
Something like the University of the Third Age (U3a) might be a starting point. There will be one near you. You can join an interest group that most probably meets weekly but your only responsibility is to attend and participate i the selected activity. There are no office bearing responsibilities or other regular commitments.
Social contact is available, new skills can be learnt and who knows where this might lead.