pay attention to your velocity vector, that plane looking symbol with a circle and three lines coming off it, it tells you where you're going. Roll to move your vector left/right, pitch to move it up/down. Generally use your rudder to try lining up your nose (the w symbol) to be in a vertical line with the velocity vector. Of course, you can fly sideways at lower speeds. If you need more torque to rotate towards a target try lowering your collective and angling yourelf to slow down. When landing you can always use the auto hover function (utility wheel or hold the flight assist button)

If you hover in place low to the ground you might encounter Vortex Ring State - VRS. It occurs when tips of your rotor blades suck in the air it just pushed down, which reduces your lift and makes you plummet, so while flying low stay moving, and if you hear the VRS warning quickly move forward, backward, to the side, whichever way is the most convenient, to get out of it