You may google search for 'National Kidney
Foundation' & various diet options for different kidney conditions are suggested.Meanwhile,maintain a high fluid intake(3-4lit) daily,avoid junk food,bakery food,fried food.
Do not take over the counter drugs.Have good amount of fresh fruit ,salad in your diet.Stop consuming tobacco,alcohol in any form if you are consuming it.
These are some of the tips which are likely to help you.
Best of luck.