Hi,
I had the same issue some years ago. It comes as a big shock initially but you eventually find it is not a death sentance just a disease. I was told I had a life span of 5 years but sadly for that Dr I'm now plus 3 and still going.
Without a lot of help from the medical fraternaty I went on a kidney friendly diet, did my research and never looked back. I refused all medication that would mitigate my kidneys health and am now satisfied what I'm doing is the best I can for my kidneys. I'm content knowing my kidneys will see me out as long as I don't forget to look after them. I don't over hydrate as many do, I watch my urine colour ensuring it stays clear to light straw colour which is the result of my kidneys doing their job as they should. Along with CKD there can be vitamin deficiencies so I get regular checks for these as well. I take vitamin B12 and D3 to help my situations and otherwise just get on with life.
Cheers