We were in the same position 41 years ago. He passed away at a day old. My mum, a devout Christian told me after that she had prayed for him. If he was ok he would survive, but that if he was to have severe health problems he would not.
Just drop into boiling water as you would a lobster th hen cook for a few minutes til they turn pink. Bodies are very small and hard to get into, can't just peel like prawns, claws are ok. I just turn them into a prawn cocktail.