Looks like you're on your profile page rather than your pictures. To get to your images:
1. Click on your name at the top right of the screen. It will drop down a menu
2. Select 'Albums' from the list
3. On th next screen, also over on the right but below where your name is, it will say something like '5 Images'. Click on that.
4. You should now see your pictures in small format laid out across the screen. Click on the one you want to have in your post.
5. You will now see that picture enbiggened so it fills the whole screen. Click on it again, this will enable you to scroll down and follow Rich's instructions on copying the BBCode link.