Based upon what I have found around the internet, here are three tips of how to get noob lobbies in Call of Duty Modern Warfare (credit to Killer Panda).
Tip #1: The first tip to get Noob lobbies in Warzone is the tank you KD in a warzone. How to get noob lobbies will work best if your KD is below a .60kd. To do this all you gotta do is keep dying
Tip #2: How to get Noob lobbies in warzone tips 2 is to join a friend that has a horrible kd and utilize his noob lobbies in the warzone
Tip #3: The third tip into Getting Noob Lobbies in Warzone is 2 make a new account and tank that KD so you don’t have to ruin your own KD on the main account