A young girl of 17 years, weight of 103 kg, height of 170 cms, BMI: 35, presented with irregular period since last 6 months only. She is obese, her all investigations are normal. PCO profile: normal except very high level of random Insulin(197.11). Which should be between 6 to 27.

Her Vit.D is only 12.45. How to manage this?