Here is the deal:
The NAVRES PAO trade is designed to draw from NAVRES (or navy) members with previous experience in another trade, so the CFRC is not involved in the process. If you are previously-qualified in another navy trade and are interested, you would have to apply through your local NRD who responds to an annual solicitation for applications. One course a year is presently run, which involves a couple of two-week in-house phases and a few months of DL.
If you're not in the navy, it might be a long-shot. You'd have to make a pretty strong case to the NRD's CO that despite not knowing anything about the organization, you would be able to represent it to the media. The idea behind the new trade is to take people with extensive NAVRES experience and give them specialized communications training, not to recreate the (ineffective) NDPAO organization.