Zed,
If you only have seven hours of detecting total under your belt then I would not expect miracles.
Burying some coins and jewelery yourself and getting familiar with what readings they give is going to be a great help. It takes hours to get to know your detector really well, it will become an extension of your senses that lets you see underground.
If I go out with a familiar detector I can find a penny and other pocket change almost anywhere, but the other day I went out with a new detector I never used before and it was very, very hard for me to figure out what I was seeing with it.
The detector and the way it is set up can make a big difference. I love my MX5 because I can set it so it does not make any noise at all on most iron, and with a little experience reading the numbers it shows I can tell the difference between a good target and a bottle cap and many pop tabs.
Metal Detecting is not magic by a long shot. It is hard work for little pay. It is fun to read the glamorous stories where guys find gold and silver, but that is not the norm! The truth is that on most days if you count your hours and divide them by the value of what you dig up, you are going to make five to ten cents an hour, and that is if you are good at using your detector.!
You have to resign yourself to the fact that you are not out there to make money, you are out there for exercise and relaxation, and if you trip across some jewelry or money that is simply a bonus. If you think you are going to go out and make minimum wage with your metal detector then you have simply fallen prey to sensational stories and advertising.
Here is a photo of what I found the last time I had three hours to spend on this hobby, not counting a few pop-tabs and aluminum siding fragments. Thirty cents in change face value along with a worthless President Buchanan token and a tag off a rose plant. Maybe worth $1.30 if you count the collector value of the large Australian penny and the single wheat-back cent. So at the most 43 cents an hour for my trouble, and if I count the gas I burned getting to and from the site I found them at I am losing. So you simply can not be in it for anything but the fun and the education or you will always be disappointed.