Join us in vent! NJ is right, DOD and COD are similar. Maps are a little smaller, 6 classes to choose from (rifle, assault, support, Sniper, MG, Rocket). All eGO maps are capture the flag. Team wins by holding all flags at the same time. All servers except one are no Friendly Fire. You should catch on fast and everyone will give you tips. If you play off hours Avalanche and Donner are usually the most filled servers, Kalt and Anzio (friendly fire on the smallest map, real fast paced) are more prime time. Avoid Strand like the plague

J/k on the last, but it is a confusing map and not recommended for beginners.
Beginner tips, assault is the easiest class to start with, although if you were a good rifler in COD you should be fine in DOD with rifle class. Grenades explode 5 secs after pulling the pin even if you are holding them, and can be picked up and thrown back at an enemy. Generally do not use ironsights. Crouch or prone for less recoil. You can sprint in short bursts and pick up weapons from your teammates or the enemy.
Since you are a G, make sure to get a maul pin and set up your admin (see an Advisor or admin trainer for help). Take admin 101 class. Welcome.