If I create a new post in WordPress, does it automatically appear in the calendar?

It depends. The editorial calendar of Nelio Content shows all the posts that have a publication date set. If you create a new post and set a publication date for it, this post will appear in the calendar.

To schedule a post with a publication date, just click on the Edit link that you’ll find next to Publish immediately inside the Publish box. There, you can select the publication date and schedule it.

Post Quality Analysis
Nelio Content analyzes the quality of your post in a non-disruptive manner.

Once you do that, you’ll see the post as scheduled in the editorial calendar of Nelio Content. Note that the calendar is completely synced with the WordPress post editor.