Losing weight

I am 28 years old and my husband is almost 30. We have been ttc casually since we got married in 2012 and have actually quit "trying" because my cycles are irregular and Dr's tell me it is because I need to lose weight and offer me a nutritionist instead of real help......i think I have pcos, I have heavy irregular cycles unless I am taking chaste tree berry drops. I am in need of some advice at how to go about losing weight without alot of crazy exercise at least until I lose some weight to take pressure off my joints.