I'm a level 50 and do certainly enjoy the rapage I tend to cause on others but I will say this - when I begun playing BFBC2, it was not easy to get used to. I think it took me until level 12 or so to properly get the hang of it, despite my many years playing FPS games.
The way I play is to listen to everything that goes on around me very carefully. If you don't have surround sound speakers, get yourself decent headphones. Listen and keep your eyes fixed so you notice stuff that happens around you without having to look directly (I find this speeds up reaction time). When engaged in combat, whenever you can, crouch and aim down the sight (a red dot sight is brilliant) and aim for the upper body or head, burst firing quickly (fully automatic should only be used when in desperately close quarters).
I also suggest sticking to a particular class for a while. It will not only allow you to get used to the gameplay and combat but it will also reward you with weapon unlocks in that class. For example, once you get the AN-94 or M416 in Assault class, you'll be much more capable. That's not to say that each weapon doesn't have its perks, because I like using pretty much every weapon for this reason, but some work better for particular people.
Finally - always keep to a full squad if you can, stick by your team, move carefully from cover to cover, sprint when necessary/safe and listen. Move as fluently as you can, as you would in a real-life combat situation (no real-life combat training is necessary, because I don't have it - just be fluent). Remember, the weapon is merely an extension of your body!
So is your in-game character. This mind-frame allows for very fluent movement.Edited by Gib007 - 5/2/11 at 6:51pm