I agree with tabman about doing some practicing with coins. Since I don't know what you have tried already and how you sweep the soil I'll put some more words to it.
Take some coins out to a clear area of dirt and do some tests. Put a coin on the ground where you can see it and sweep the coil over it. Don't sweep too fast. Count one thousand one as the coil goes from one end of the sweep to the other and one thousand two as it sweeps back ... and don't rush the words. Visualize where the coil is when it beeps. Narrow the sweep to just wider than what it takes to get a beep in each direction and walk round the coin as you sweep and work on finding center of the beep. If you have a small coil, the 5.75 inch coil you can place the coil down over the target when you have found the center of the beep from all directions that hit while walking a circle around the coin and you should have the coin in the center of the coil. If you have a large coil, the 8 inch, you can raise the coil until you get a faint beep on the coin as you sweep across it. With the coil raised you are only detecting the coin when it is near a narrow spot near the center of the coil. With the coil raised, walk around the coin while sweeping the coil and see where the center is. Visualize where the coin hits the coil center as you sweep. If you have the 8 inch coil you should be able to see the coin through the center hole as you sweep across it. That helps you find center.
When you are confident that you can find center on a coin you can see laying on the ground, use the same technique of sweeping slow and narrow when right over a target you find in the ground. See if that helps some. A pin pointer can help recover targets in the hole too.
Most of the time false signals do not repeat well as you sweep over them several times. If you get a good tone in what seems like the same spot when you have swept the coil over the spot 4 or more times, I think you will dig a piece of metal out of the ground if you can find center for the beep.
Some areas do not have a lot of targets, some do. Sometimes it takes a lot of work to cover the cost of batteries with found coins.
If there is a metal detecting club near you, or a detector dealer near you, see if you can get some tips or some demonstrations of detecting with someone else finding a target, then you checking it, locating it and recovering it. Sometimes watching someone else go through the process can be worth many thousand words.
Keep us posted on how you are doing.
Cheers,
tvr