To do something?

Is
4

What can you do as a 15 year old girl to get to know other girls, i.e. When you meet someone for the first time? Go shopping or Netflix or something else?

fi

Do something together that you all like.

Maybe just a shopping trip and then go out to eat. Or you can meet in town and go for a walk.

Is

I just wonder if there won't be an embarrassing silence soon. If you don't know each other and they don't talk a lot by themselves… You get to know each other best at school, but the classes have no contact with each other

fi

Well, how did you get to know each other?

It's best to just start a small talk. What school do you go to? Do you have pets? Etc. Such standard ask. This is the easiest way to start a conversation.

At some point you will know each other better and then it will work by itself. Or you notice that it doesn't work out with them after all.

Is

We mainly "met" each other via snapchat or insta and go to the same school