Wehn this happens to me it's always because there are problems with your connection and not because really there aren't lobbies. Exit from the game or turn off the console and then try again.
I am truly thankful, but I believe I am so bad I'd be wasting your time, and I'm not going to have time for a few days to try and improve some. I will still add you, if you will have me.
And it seems that the root of the problem was the network indeed. For some dumb ass reason, my router makes the xbox traffic limited if I set a static IP. God, I hate ISP provided routers because not only are they by default cheap crap, they come with all their locked and hidden bullshit.
I'm at work, but I'll add when I get home... which is in 11h 30m. (Working 12h till the 18th... sigh... my employer is the kind of person that should he die, would not make the world a worse place.)