Go slow. Swing it slowly. Swing it very slowly. Take some change with you and drop a few coins on the ground to practice. Check out the links and practice, practice, practice. The Minelab site has a cool emulator feature that you can download to practice on your computer. I know it sounds silly, but it really will help you get used to the controls and what they do. You can also play with it when you can't detect to learn the sounds. My jump was not nearly as big as yours but I am finding stuff like crazy. I know I am hunting primarily in the turn on and go mode but it is good even used that basically.
Good luck, Don