Hi Keith,
Welcome to the site! I have some answers to your questions.
In terms of pen name versus real name, it's a mix. Some writers prefer the anonymity while others want to start to build their brand around their real name. I think it depends on whether you plan to publish with your real name or not. There is no rule or convention on the site.
Now, in terms of your story and getting feedback, you should post it to TheNextBigWriter Premium group. This is the largest group on the site. Doing so well also make your story pay points and most reviewers look for that. It shows you plan to not only get reviews but also give back. Premium is the best place for new members. Once you have built a solid review group, you can split off.
Your account comes with 7.5 points but that is probably not enough to post a 9,000 word story. I'd break it into two sections and post again to premium.
Let me know if you have any other questions or feel free to post them here.