Simple diet plan for picky girl teenagers that are vegetarian?

So, i'm 13, female, i'm around 160 pound, and between 5 foot 1 inch and 5 foot 2 inch. So i was looking for like a diet plan to try and follow like daily. My friend had this diet, really simple, she followed it for like a week or so and lost five pounds, and she started looking slimmer right away, and she keeps up that diet, so i'm looking for something that's similar to hers, but she never like wrote it down or really told me everything, like what she was eating, so i don't know exactly how to explain it, so if you can help, thank you so much!!<3 (: