always encourage a new singer to gain confidense by giving their tremoring little voice the same respect as you would the old shantie singer that sailed before the mast.
bear in mind that you are an unknown singer you must come early to the session (organisers know their regulars who will finish the night well).
try to remember the words, but if you don't, we've all been their and won't be too worried.
wait for your turn to come round and SING.
if you keep getting missed out let the organiser know that you are prepared to sing.
and come someone arrange a speling checker.