As you've already guessed the progression of mild kidney insufficiency varies based on individual circumstances. Here comes the bad news/good news as I see it… On the bad news side something has caused your kidney function to decline and this "something" may be out of your control depending on the diagnosis from your doctor. On the good news side it sounds like your kidney insufficiency has been caught early so there are likely a LOT of things that you can do to protect your kidneys. Maintaining optimal BMI, proper hydration, controlling blood pressure, keeping a healthy diet, daily exercise and managing stress all are things that can ease the strain on your kidneys. I've found it very helpful in my own journey to separate the "I can do something about it" items from the "this is just the way it is" items. Be prepared to ask for referrals to a kidney specialist, dietitian and/or physical therapist if you think they could be of help to you. Best of luck and keep us posted.