Babe, half the people at any gathering already know you and are your friends.  You've got nothing to worry about.  Every gathering has a go with the flow kind of vibe.  Over the years, I've stopped worrying about making plans going into gatherings and just hanging out with folks I like.  A good time always ensues.
And it's not like you'll ever be the only new kid.  I've never been to a gathering with only one newbie.
It's great that you're looking into coming to one.  Like I said, everyone already knows you, so introductions are pretty moot.  Hopefully, we'll see you at one sooner rather than later.  🙂
Off to work for me.  Enjoy your lazy pj day!