That you renew, but you get contracts as you open packs. It's a lot more simple than it sounds.

I like the challenge of building the team and my son likes to play the team against people online.

It took me a couple hours when I was shown the game mode to figure a couple things out, but once I figured it out it became the only thing I do on Xbox. The auction house buy low/sell high excitement is pretty wild.

Maybe give it a shot and look around the game mode. I can answer any questions you have about building a good team quickly.