This isn't an exhaustive list - but if you are needing some social interaction here are two great places to start - especially if you are older and just looking for a friendly face. Try these out!
This is the "grandfather" of social media sites. This information isn't mine - but I want you to know HOW to use it - not just be on it. Since it doesn't help you if you can't get help - so - check out this video by Jeff Meland.
This is a great way to video chat with people and it doesn't require a lot of work on your part unless you want to set up your own meeting. The people over at Zoom have been instrumental in helping people during this trying time! In fact, they have set up a demo form - where you can request a demonstration! If you don't think you need a demo - check out this support page from them!