To answer your questions.
O&A are going to broadcast on a Premium channel like Playboy does. Which means that you will need to pay an additional $1.99 per month to have access to that station.
How hard is it? Depends on what you buy. If you buy a car radio install that depends on you; how good are you with that? If you did what I did, I got one of those portable units, and I have the antenna on the far back of the car, running into my trunk area, tucked in on the left side behind the plastic paneling, undertneath the rear seats, underneath the floor mats in the rear, wrapped up and tucked in on the right side of the driver seat, and just the right length to extend to the unit that is on a stand that I stuck next to the climate controls.
As far as WOW; that was a thing of beauty. Me and a guy I worked with went to NY one day, and I told him it was WOW today, and after I was done explaining we had a sign made in a few seconds. Nobody WOW'd us, but I did get some guys in a van asking what WOW was about. I just told him to listen to O&A, especially on Wednesdays. (How many people right now are reading this and saying, "What is WOW?")