Make a new page
Before you go ahead and make a new page, please read NamingConvention so you know how you should name it. If you don't get it right, one of the Janitors will make a copy and paste into a correct page and delete yours. So make sure you get it right.
After you've created it, one of the Janitors will add it to the MissionReports page. Use the ingame channel Eve-Survival if you got questions or want inform us of your newly created mission.