I have never really created a creepypasta before. But I wanted to.

So I was wondering, how should I do it? Should I plan it on Word until it's 'perfect' and then copy and paste it on this Wiki, or should I just write it directly on the Wiki?

Also, I wanted to write about a small boy who is home alone at night, and finds himself petrified from fear of the dark. Then he needs to pee, goes to the toilet and finds a monster and stuff. Would you think this idea is good? Any general advice?