If you are looking for reading material, books, I would recommend the Flat Belly Diet for Diabetics, even if you have no issues with diabetes, as they are even more aware of the nutritional needs of a compromised system. There are several others I found very helpful but I'm not home right now, on vacation, yeah, but will list them later.
The DASH diet is geared to hypertension, but, it too has very healthy eating as well. Lots of information on the internet about that.
The big thing is to become aware of cutting back on meat, but also to include protein with most meals, just watch the portion size, a deck of card size, or the size of your palm. It is just easier on the remaining kidney if it isn't overloaded with too much protein, creatinine, to filter out of the blood at anyone time.
I donated on March 10 of this year, at 59 1/2 and had a little HBP afterwards. I was overweight, little excercise, and not eating properly before the surgery. Since then I have dropped 18 lbs, walk and jog, eat great food, and feel better than have for several years. Hubby has followed the program as well and is also seeing the benefits. The HBP is very low normal now.
My hubby is type 2 diabetes hence following those diets but they are very healthy diets.
Congratulations on your donation and you have found the best place and folks to get the answers to any and all questions you may have. Janice aka dodger