Kathy, you can gain between 1 and 2.5 points per post. You now have 7 posts and 11 points, that will probably around the average of what you get per post.
About the domains, they are allowed and actually both the same. The www version will display the same thing as the one without a www. Of course you need to own a domain before you can host them. Otherwise we'll provide you with a free subdomain with or without the www like something.frihost.net.
Thanks very much for answering my questions. Friendly forum, this.