You can start writing straight away, whatever your website is based on, even if you don't have a website yet.
If your website is based on WordPress, it is better if you post from within your own site, just go to Plugins->Add New and search 'Vacation Soup'.
If your site is WordPress your posts will show automatically. You will need to use the RSS feed to show your posts for all other website types.
If you don't have your own website yet (AirBnB and HomeAway are not owner's websites!), check out our free and custom-built websites.