Most important step is lifestyle modification: Healthy diet + at least 30min. of sweat inducing exercise daily. Since you are having irregular periods
, you are not ovulating regularly for which you can take simple tablets after consulting you doctor. Another way is Laparoscopic ovarian puncture, which will resume ovulation in about 50% cases. But as laparoscopy
is invasive operation, its better to go for simple treatment first unless laparoscopy is indicated for other reasons.