i no i dont no you, but i hav a friend in your situation, and i am in your situation too (but with hip hop dancing)... if あなた are getting shy then あなた have just got to block everyone else out, sing like あなた are just 歌う in your room によって yourself, and forget about anyone listening. if people hav told あなた that あなた are good then i am sure あなた are. if あなた dont believe them then ask other peple, that あなた rent affraid to sing in front of and that あなた no will tell あなた the truth. lots of luck... georgie xx
Try to get over your shyness. Sing infront of a few people and slowly add もっと見る people until your comfortable enough to sing infront of a crowd! :] Hope i helpped!