Weight of 82 kg is a normal weight for someone 6 feet tall. Most south
indians are shorter which suggest you are overweight.
Insulin will
promote weight gain. Lose weight by eating less. Avoid bread and rice,
eat more beans, dahl, and vegetables and fruits and avoid foods deep
fried in oil.
Weight loss will have a great impact on your glucose levels and aid also
in the lipid numbers. It is the single biggest thing someone at your
stage can do.
You did not mention taking oral diabetic medications, they are the usual
first course to add if exercise and diet modification is failing.