If you're new to the site, your first post will have to be approved by a moderator, then you'll be able to post freely and use the messenger. It's just to screen the boards from spam.
This is the introduction section. People do read and appreciate every story even if they don't always have a comment to make, so don't be discouraged if you don't receive a reply straight away. If you have read someone's post and just want to thank them for sharing then it's always a nice gesture to click on the like button.