I'm turning 21 but have few friends. What to do on my birthday?

I’ve recently gotten over several obstacles to do with social anxiety. I’ve gotten closer to certain people and also had to cut certain people out. I haven’t had an actual birthday party since I was 10. I’ve had small get-togethers with either family or a couple friends but was always too shy and lacking of friends to plan something bigger.

I have more friends and acquaintances now, but they’re kind of all over the place and not from one particular group.

I’m a 21 year old girl who just wants to have a dinner party at a nice restaurant. I find this a difficult thing to imagine though. Would it be awkward inviting so many different people that don’t know each other? I think this would be an invitee’s biggest concern. I would hate for people to feel awkward.

For me to do this will be realizing a very challenging task. In fact, if the night goes smoothly, it will actually make my life. I never plan anything for myself, let alone any type of get-together. My biggest fear is that it won’t be any fun and that everyone will feel awkward. Any advice or thoughts on this? Thank you.