Your primary care physician is well qualified to care for early stage chronic kidney disease (CKD). It is most important that you continue to see your physician regularly and have blood and urine testing for CKD. If your blood pressure is well controlled and you lead a healthy lifestyle, there may not be much more that needs to be done for your CKD. I am a strong advocate for the DASH diet in early stage CKD. You should follow a low salt diet and you can review the DASH diet at: https://www.nhlbi.nih.gov/health/health-topics/topics/dash
I do not advocate a low protein diet.