I used to be very shy. When I first started, I had to go to a casting, and I had to go in a bikini. I thought I was too skinny. But I went in and got the job! And that's how I started.
Don't give up, be positive and if you know someone who knows someone at a record company don't stop beating down their door till you get heard. Don't ever say it'll never happen or it'll never happen.