Re: Aiming
If you are using a controller (gamepad) all you do is move the right stick towards your target. In your settings you can also adjust the sensitivity of how fast the joystick moves. Your specific sensitivity will be personal preference. If you want it faster, but it seems too fast for you, try turning the sensitivity up a little bit at a time, and upping it a little every few rounds after you are comfortable with it.
Goes well with an analogy I have heard alot in my life:
If you throw a frog in a pot of boiling water, he will immediately hop out. But, if you put that same frog in a pot of lukewarm water, turn on the heat and slowly bring him to a boil, he will remain there.