Once you've registered for an account (it's free) you can submit your story by using the "Submit a story" link at the top of the page. There you can then enter the details your story. You'll also have an opportunity to tell us what kind of feedback you are looking for.
Once your story has been added to the Story Pool where your fellow reviewers can view it to give some initial feedback. Once some feedback is given, your story will then appear throughout the site allowing everyone else to comment as well.
You should upload a JPEG file that represents your project. It should be at least 400px on the long size. For ideal display keep the dimensions as close to 700x400 as possible..
First login to your account. You can then update your photo any time by clicking on your username at the top left of any page. This will take you to your profile where you can edit your profile photo.