By listening to other detectorists and getting more experience, you will learn:
(1) how to use your particular metal detector, e.g., how to interpret its sounds and meter readings, how fast/slow to move the search coil, how to adjust the settings, ...
(2) the clues about the terrain which are more likely to yield items, e.g.,
- Around the base of old trees. People sit under them for shade and money falls out of their pockets.
- Under bleachers at baseball fields, though you must sift through a lot of trash
- Along baselines in baseball diamonds
- On sloping hills where people sit at outdoor music concerts, ski slopes, etc.
- Under playground equipment
- Near refreshment stands in parks
- Where the rides (e.g., ferris wheel) were located at fairgrounds
- Sandy beaches - some were so full of coins that I found a coin at almost every swing of the detector and my body grew so tired we left the beach after filling our pockets with coins even though we knew there were so many more to find.
Have fun. Don't forget to fill in any holes you make or you won't be welcome back.
I could tell you lots of stories about skeptics. I told a friend I could could find money in his back yard and he scoffed. I got my metal detector from my truck and started swinging it in his back yard. He stopped me after I found about 10 coins in the first 15 minutes.
An executive asked if I had paid for my detector with my finds. I answered that I had found several times more than the price of my metal detector. Then, I asked him if he had made enough money playing golf to pay for his golf clubs.

That shut him up.