Tips for Newbie:
- Don’t be discouraged if it doesn’t work on the first try. This technique can be difficult to learn at first. Keep practicing!
- Moving the tip of the tongue closer to the roof of the mouth when blowing out gives your whistle a higher tone.
- This can be difficult for some people, especially those with missing teeth, gaps, or even with dentures, partials or other oral fittings. Don’t be discouraged-be patient with yourself, and above all, have fun with it! Watch your attempts in the mirror and make corrections when necessary. If the whistle doesn’t work, the faces are good to laugh at!
- Make sure you practice someplace secluded. You don’t want to drive crazy friends and loved ones with your whistling attempts.
- Wash your hands before whistling. This will keep the germs from entering your mouth. Wait until your hands are dry, then try to whistle.
- Do not place fingers directly or against your tongue, but try to put a little sideways.
- When you whistle The wolf (with 2 fingers in each hand) make a shape and play with the angle of your fingers, the best lung capacity you have, the best sound you will get out-keep practicing and don’t give up!
Source: how to whistle with your fingers