You're an elderly diabetic on lifestyle modification and diet as a means of managing your diabetes
This methods can be adopted for 3 to 6 months and if it is not working medications should be used.
By any standards your FBS is high and HbA1c
also reflects it.
Without medications it will be difficult to bring the blood sugar to control.
Your Urea and Creatinine
values are at the upper limit of normal.
You be further evaluation of your renal system.
Check up Blood pressure.
ACE inhibitors are renoprotective in Diabetic setting.