i had a same feeling wif u during my 1st attempt. i told my sis i want 2 go bck, i dun 1 2 try. Coz evry1 there looks so professional, pretty n confident!
But now i knw, SIA is not only looking for pretty gals BUT with EQ+IQ. Good English over confident = OUT; Lack of confident oso OUT.

So, no worries. Try n get experince, u will be BETTER for ur next attempt!
haha, i knw talk is ez...So, actually no1 can help, only u urself!

CHEERS!!!