Hi,

My name is miranda and I am 13 years old, can someone give me an idea on an aim sn or a nickname or even both

Try something that fits your personality or an interest
Or a mood like blue funk or purple haze
You could try an oxymoron like vivid wind or quiet storm

The answer above is great, use an interest. I have always been a huge lover of stars, especially the 3-D looking ones that you see on maps, which are called nautical stars. That's where I got my name from :p

Just think about the things that you love and you'll find your name. :)