I personally like to know what is going on with my body and love charting. I say start now, or maybe even later this summer since you aren't going to start TTC until Oct. Charting can tell you when you are ovulating, IF you are ovulation, if you might have any issues with your luteal phase, or with your progesterone, etc. It might make your TTC journey shorter if you already know what your body is doing. With that siad, the more info you know ahead of time, the better, so maybe soon? If you are already on hormonal BC, then coming off the bc in advance might help with getting your body back in the swing of things. Not all women have difficultly coming off the pill, but others do...
Hope I'm not being too pushy, lol. I just love charting.