@LORWEN108 If you repeatedly avoid discomfort, your brain can learn that discomfort is dangerous.
If you repeatedly approach manageable discomfort, your brain can learn that discomfort is survivable.
Gradual exposure to discomfort tends to increase confidence and resilience.
To all the supporters of the Japanese national team attending the World Cup live on-site: I'm terribly sorry, but could you please learn another 4-5 songs and mix things up at the game? Wishing you all the best. Good luck!