Here is how you start a new post!
First, contact that blogadmin person! Have them set you up with an Author User Account! This is easy, it takes about 20 seconds! Once that is done you can login to the admin site (which is essentially your blog site) and start posts at will-start as many posts as you want on any topic that you want. Remember, you will only be able to edit or delete YOUR posts! Posts from other authors remain their personal property to edit or delete as they wish! Awwww, utopia!
I just updated my web site in 4 seconds!! 
I rock!
