Hi Kara, I thought this meant to come get YOU.
Hey, it's April Fool's Day
Introduce yourself in a calm voice and if everyone and their brother wants to see the dog at the airport I'd give them just a second and say I was sorry but needed to go potty her so she isn't hit up with a ton of people.
Keep the evening mellow and quiet. Remember, she's had a plane ride, doesn't know you, is out of her element, might be missing the other dogs she's used to, so she has her own set of feelings to deal with. Give both of you an adjustment time then invite friends over who are probably going nuts wanting to see her
Does your balcony have railings that she could accidentally get between? If so I'd find something to put around it.
I sing softly to my dogs and while I can't carry a tune in a bucket, they enjoy it and it's calming to them. It gives us quality time together all alone also.
Do you have the same food she's used to eating? If you want to change something with her, I would do it slowly however I'd lay down the law at any bad behavior quickly.
Havanese are pretty good at getting used to new situations so you two should bond pretty quickly. Good luck to you! She's a cutie.