Hi Lorna
It is possible to follow a reduced carb diet and safely manage your CKD. Losing weight and improving your diabetic control will also be beneficial to the condition as well as reducing your chances of other diabetic complications and improving your overall health.
Unless told otherwise by your renal specialist, protein intake of about 0.8 - 1g per kilo of bodyweight per day should be fine. Make sure you eat good quality protein such as lean meat, white fish, lentil, pulses, soya or tofu. You may already know that limiting your intake of phosphate rich foods is beneficial to CKD sufferers so watch your intake of things like oily fish, shellfish, nuts and cheese.
There is lots of excellent advice on this forum about typical low carb diets so do have a look around. What I would suggest though, is that you start off at about 50g of carbs a day - if you haven't already got one, buy a Collins Gem Carb Counter so you can look up the different food values. Test your blood sugar levels before meals and two hours after to see how different foods affect you.
If you have any questions or need more information then just ask as we are all here to help. Or do PM me if you prefer. And obviously, do consult your renal specialist if you're unsure about anything.
Best of luck
Mrs P