Welcome to the forum. I am also new and going through the same thing. For me, I bought the Ramair and will probably put TORS pipes on. I downloaded ECU and just started playing with it. Everyone here is great and give a lot of info. The search tool on this forum will be your best friend. Grab a beer and keep reading. As with all internet info take everything in stride.
I've been on several forums for vehicles I have previously owned. I have modded all of them with varying results. One thing I have learned is there are people who will swear that their mods are the best when in fact they might not be. Some people like to justify the money they spend.