Well, guess what? You've come to the right place. I don't have PCOS, but a lot of women here do and are doing great. You can search the archives for PCOS threads, and I know there is a PCOS introductory thread here in this room (if you haven't already seen it).
Don't worry about the grass-fed thing for right now.
As far as exercise, I cut myself some slack for the first one month to let things settle a bit and for my energy to ramp up after the "low carb flu" (which it did, nicely), but then after that first 30 days I began exercising. Right now I'm hula hooping and LOVE it. It's a real workout, but I don't even realize it. There's a lot of fun things you can do that don't seem like exercise -- bowling, hula hooping, belly dance class, power shopping! -- the main thing is just to move more than you used to.
Ah, onederland! You will get there, as long as you see this as a lifestyle change and not a diet. It's totally easy living this way, and pretty soon now you will come to see that our bodies were MEANT to live like this and that the way we eat is indeed the proper fuel for the human machine. Just keep on keepin' on.
"Let food be thy medicine and medicine be thy food." -- Hippocrates