As someone who has relatives in other countries that I barely know, I would say don’t put too much pressure on it. If you click well and become friends that’s really awesome. But if you haven’t had contact for a long time (or ever?), look at it like meeting a stranger. Not everyone will be compatible and if you don’t feel a connection that’s ok too.

I'm an only child and my cousins we're like my siblings.

We don't talk much (distance and time zones)... but we're still close...if that makes sense

this is awesome 😊

and also the first time they have seen you in ages and they are moving too, they must be excited and nervous too