hanging out with her.

Hi Im a high school teenager. I've talking to a shy girl I like, and I asked her if I could hang out with her over the summer. She was a bit nervous about it but she said "okay, but only as friends". I was willing to accept her answer because well, I don't really know much about her, so being friends with a shy girl like her is a good start to get to know about her I guess. The problem is I haven't hanged out with a female friend before, so I don't really have an idea of what "hanging out" with a female friend is or what not to cross between the line of friendship and a relationship. Any helps appreciated.