Don't worry, you get better quickly, but it may be harder these days with less and less people playing (thus making the group that does "vets" of the game) but that shouldn't be a big issue just yet.
My advice for beginners, stay put, don't go running around or else you'll get hammered because 1) people stay in a position and you cross their path and you are killed due to them having the advantage of surprise or 2) you get killed by a much better player doing the same thing you were (running and gunning).
That's not me telling you to camp, but every time you respawn sit in a nice cosy position, wait for someone to pass by, take them out and move on and repeat. At least this way you'll learn about all the little hiding places people take up and your kill/death won't look as bad.
Also, play ground war, it's the easiest place for newbie's to earn points because in the domination matches you don't have to be good at kill people, just capture the flags. Same goes for Headquarters, but there's less people and you're all going for the same single target (so you'll get killed more oftenly).
I'd say a 1:1 kill/death average is a good starting target for newbies.







