If you want to find our reddit, you have to search no more.
Here it is.
If you want to get a basic idea of all PP activities (from the Hudson perspective) you can watch this
video. We also have guides for our new players in our right sidebar and in the strategy sticky. If you are a newish player I wouldn't bother with doing fortification/preparation for merits for now (quite expensive), except if you have times where you are in the reach of your PC (or are you on XBox?) and can fill up with the free contingents every 30 minutes. Best way at the beginning is to wing up with us to undermine though. Just keep posting stuff that's unclear here or on reddit. Would be much faster to answer everything you want to know on our Teamspeak, so feel free to hop on.