Meeting my sister again

I haven't seen my sister since she was six years old. We came from a broken family and I'm happy she's in a better place. I recently was given permission to have regular contact with her but I'm too far away to see her physically. I'm lost on how to reconnect with a sibling literally half my age after so much silent distance. I'm trying to learn some things she likes, but Idk. What do you talk about when texting an 11yr old all day?

I also have depression and have moved far away and had 0 contact with anyone outside my household for over two years so I'm antisocial and that makes it harder