Cheats:
Controls hint:
You should customize your HUD immediately by adjusting the button size and opacity to where they will do you the most good without obscuring your vision. There's also an option to enable auto-shoot, which fires rounds at your enemies once you line up your shots.
Cover hint:
Crouch behind knee-high cover to shoot while otherwise out in the open, usually without taking any damage. This lets you see and shoot enemies while still offering some cover.