Should or Should Not

Church is having an audition for choir members intake and during that time I was wondering if I should join the choir or not. The other day my last time piano teacher called me and ask me if I will attend the audition. Then I told her most probably not coz I don't want too as my voice not so nice and if I sing with nice voice then gone lor the choir :P

The thing is I know what I can do and not many people know what I can do. Now is my piano teacher asking is a sign from God to ask me to start using my vocals for HIM?

What do you all really think I should do? The answer will be found when I next tell you if I did join the audition or not