So I was doing some surfing online and came across websites like FictionPress and Wattpad. In these types of websites people of all walks of life post their stories whether it's short or actually the length of a novel. I don't plan on publishing a novel anytime soon, I have too much to learn but I'm curious if posting my stories on these websites is a good idea. I know it's good for critiquing but what if one of my stories has risen to a certain caliber where it's actually possible for it to be published. Will posting my stories on sites hurt my chances of publication and will my stories be in danger of copyright?