I certainly know that feeling. My friends got me to play Halo but 9o% of the time I'm just waiting to respawn because I'm bad at not dying.

And apparently melee (literally, weapon to the face) is how I get most of my kills. So basically, instead of hitting them with bullets/rockets/grenades, I'm hitting them with the gun.

..Does your game have a melee button? Because that might work.