Hi pilko.
First you click on home. That takes you to the list of "boards" eg Arillas General Information, Corfu Flight board, Accommodatin Reviews etc.
Select the appropriate board (eg Tell us your story for holiday reports etc. Mostly self explanatory.)
Click on the title of the board you want and the posts in it will then be displayed.
To start a new subject click on New Topic at the top of the panel.
Give your post a Subject title and type your message. Check it over and click Post at the bottom.
Hope this helps
Phil