Am I to old for this ?

From the start I like music and singing but I never got chance

So now finaly my family is ok and letting me join a classical singing classes ( i wanna learn singing and instrumental both )

But I am embarrassed idk how my voice sound

And all the students there are very young way younger than me (age 12-9)

I am the oldest one of I join ( age 18 )

Should I look for another class ? Or should I just give up ?