The best thing to do is find the women with PCOS and emulate what has worked for them. You want to piggyback on the PCOS women who came before you and already figured this shit out. Do not listen to a male gym rat who has never been more than 15 pounds overweight. What works for him is not going to work for you.
As far as how long to give an n=1 experiment: one of the best things about the Paleo/Primal lifestyle (not just the food plan) is that it really puts you in touch with your body's signals. You will know pretty quickly if something doesn't work. Example: Me IFing through dinner is an epic fail. I knew right away that it SUCKED (for me). So that n=1 lasted all of 3 days, clearly a big NO. I spent all of the summer before last trying all sorts of different IF techniques/windows/feeding times. Other things like what level of carbs will work best for you, I'd give no more than 30 days.
If this place throws you into info overload (it's understandable), you should pull back, keep it simple, and just go by the book. Most of the Friday success stories don't even come over into the forums.
"Let food be thy medicine and medicine be thy food." -- Hippocrates