There are literally 1000s of videos on YouTube to teach you how to use a duck call. We will post a few videos ourselves. There are 100s of brand names to choose from. Pick one. Buy it. Sit and LISTEN to NATURE, the ducks on the water. Listen to ducks flying. Practice. Then Practice some more. When you sound like the ducks outside, you can quack! Now you must learn how to communicate with them. Again, another process of sitting outside listening to nature. After several years you should have calls and whistles and the confidence to give them a toot. Have fun!
Check out some videos we found on YouTube to get you started. Here are some good links for you to check out as well: