Here is some exercises to feel and sound more confident.
youtube.com/watch?v=nzK3g0pT250
Exercises For Building Confidence
youtube.com/watch?v=P41ER1Wmkj0&list=PLzVsXrkgRGcmKuP1hx-ApdpIztC4de4Jp
How to say NO! and squash bullies forever
youtube.com/watch?v=K64Oz83swmA
5:00
Fear of public speaking
youtube.com/watch?v=m2MSC8G_f50