When new accounts are created, there are certain restrictions placed on their ability to post to prevent spam and other moderation-related concerns, including harassment and "troll account" creation. If you ever run into an issue where you believe you should be able to post and cannot, please get in touch with Cordovan through the forum Private Messaging system. If you are unable to post there, get in touch with Community/Forum Support through help.standingstonegames.com.
Typically, new accounts should be able to post wherever they would like within a few days to a week.