I'm getting to know people from school, but when the opportunity to hang out outside of school arises I feel anxious because I am not sure what we would talk about and if it would be awkward when we run out of stuff to talk about.

How can I overcome this and make our friendship more comfortable?

Thanks

Hey man,

I get completely where you are coming from.
When you are out with your mates conversation normally arises from the surrounding environment, or the people you are with. Just talk about things you like and some form of conversation should come from there, you could end up in a completely different place where you started and it really makes your day much more interesting.

I hope this helped!