Hi, Your ideal weight should be between 58-62 kgs.Conceiving depends on the regularity of your menstrual cycle where your body weight plays a major role. There is n o one diet that fits all. We need to know your present intake and physical activity levels  to chart out a diet plan.However to start off you can increase proteins and reduce carbohydrate from your diet.Include lots of fresh fruits n vegetables.Eat 5 small meals a day.Sleep 8 hrs.Avoid afternoon naps and drink 6-8 glasses of water.Do yoga or cycling or stretch exercises.Consult privately for better results.