Good luck man!
Diets are a bit hard sometimes, you really have to know what your doing. You gotta start by seeing how much calories your body burns in a day, then try to see how much you eat in a day.
If you don't train much, its better to eat less then you burn, as a result you'll start losing fat.
If you start training a lot, I was reading that you actually need to eat more then your burning, it sounds messed but it was true for me.
I would go into greater detail, but that might take a while, so if you need any help just to see how much your burning or diet plans, let me know