Hi I Am Male 76. Last Year My EGFR Was

Hi I am male 76. Last year my eGFR was 53, have high blood pressure .taking 1 and half Lisinopril a day, with the V A. One vitamin D3 at night I take. One half sSimvastatin with bayer 81. This year my EGFR is 48. Looks like I have been eating all the wrong things. My creatinine is 1.5. I'm told to get on a strong diet restriction. I'm very worried about kidney failure, taking care of wife with parkinson takes a lot out of me. My question is what my life will be like in five years?