The former Oakland Raiders quarterback joined the NFC West side earlier this month, where he will work with head coach Bruce Arians, who has previously tutored Peyton Manning, Ben Roethlisberger and Andrew Luck.
The 33-year-old told The AP: "It's very, I guess user-friendly would be the right word. There's a lot on film to watch, plenty of texts in the playbooks and diagrams, pictures.
"It is easy to learn. It's not easy, but some systems you get in, it's difficult to learn because there's not a lot of history, but with this, there's a ton of history with this offense and this offense being successful, so it is an easy offense to get used to.
"I'm getting my feet wet, but for being three weeks into a playbook and having a playbook to take home and film to watch what coach Arians did last year, it's a phenomenal system."
The Cardinals finished the 2012 season last in their division.