To register, just set an username and password, you will recieve a confirmation email. Check spam, often the answer email goes there.
Once registered, you will be able to post into the forum part of the site, for recruitment etc.
If you are member of the guild, request a higher level so you can post on the site, upload images etc. You can do that sending me an ingame mail.
…once given a higher status you are now able to create posts:
How to do so? very easy:
As a new WordPress user, you should go to your dashboard to create new posts for your content. Have fun!