I need some help.

I need some help with how to write a story on here. I keep seeing stuff that just confuses me. I write in MS word if that helps. I have no clue how to copy or paste stuff, and I just want to write a story on here. Can I just write a story in the body section like for a blog? Would that work? People sometimes get ticked if protocols are followed, and I don't really get the submission instructions, I'm still new to the computers now-a-days.

Help me please.