If 당신 mean posting it on Fanpop, 당신 should post it as an article. Chose the option 'Fan Fiction' when 당신 are posting it. Obviously 당신 should post it in the most appropriate spot, depending on the subject of your 팬 fiction.
당신 have to have an account on fanfiction. YOu go to 'document manager' and 업로드 your document. Then go to 'new story' and create a new story. I think 당신 have to wait 24 hours before 당신 can post one though.
