Don't put it down the skin,
if anything bag it and put it in the trash,
but remove it from the mold and wash the mold up to use again.
but I think you should try and rebatch that batch.
and I also think you may have gotten some bad info from the class you took. Stick around. Google to learn more. Return here to ask questions and learn more. And try again. Don't give up, because I think you had some bad info which is why this batch didn't turn out well. (to much water way to much)
and maybe start out with a 1 pound batch. There are many things you can use as a mold that you have around the house. Right down to a simple box.
But don't give up yet.....