I have autism, anxiety and depression. So I guess I'm trying to say I kind of trying to say that I kind of know what I'm talking about here. I think that you have pretty bad social anxiety, and by what you've said, it's worse than mine. For me, it's much easier to make friends online. You don't have to look at them, it's understandable if you don't message back to quickly, giving you time to think about what you type. I would suggest going on some form of social media, making up a new username, so if something goes wrong, you can wipe that username, create a new one and try again.
Hope that helps