What is published can rarely be taken back.
WordPress has a wonderful option called scheduler which allows you to schedule blog posts in advance to publish at a time and date as you require, so I could go on holiday for a week and leave seven posts in schedule to publish each day I am away without being present.
Scheduler has the advantage of allowing you time to think, a review period in which you can decide if it should be allowed to be published. Once you publish, you are damned. When I hit the publish button 690 people at the time of writing will get the post in their e-mail, and some of those may forward the post to others. Sometimes when I publish, the embarrassing spelling error reveals itself like an ugly spot on the nose, the moment I make a cup of tea to calm my frustration.
Better to write something and let it stew a while before publishing, for sometimes what is published can cause problems if it is controversial, or in some manner is a poor post. The day I wrote this blog post was after two insightful events. Firstly, I was distracted by a phone call, I hit publish of a post I was supposed to schedule for the next day, a cup of tea moment. The second event was a blog post I trashed because it failed to meet my publishing standards, I am glad it will never see the light of day.
Enjoy your internet publishing experience, but beware that anything you publish on the internet will likely never be erasable, and it will stay to impact you and others for the rest of your life.