Hi Stacey, welcome to 3FC
1500 calories sounds perfect! They used to recommend 1200 calories, but that is still kind of low, so many nutritionists recommend 1500 now. You'll benefit from the extra 300 calories, because you'll have more energy, and you probably won't get hungry so you'll stick with it. Some people eat even more than that and still lose weight, especially if you exercise, too.
Where did you get the diet plan? Does it have suggested meals on it?