the first part of call of duty 4 you have to understandthat it is a fast game.
Step2
In multiplayer the first thing you have to o to get good is play a lot for the first few days, then after that you will have unlocked some good but basic guns.
Step3
Aftr you have the basic guns, you hould start joining team deahmatchs because at first you willprobablynot be that good and in team deathmatch you get teampoints as well.
Step4
victory
once youget the more advanced guns you y=will probably haveyour road to victory set out infront of you