To add a new Post, hover over the Posts menu option in the left-hand navigation menu and in the fly-out menu, click the Add New link. Alternatively, click the Posts menu option and then click the Add New link underneath, or the Add New button at the top of the page.

To edit an existing post, simply click on the relevant Post title, when viewing your list of Posts. Alternatively, click on the Edit link that appears beneath the title when hovering your cursor over each row. The screen that appears will be exactly the same as the Add New Page/Add New Post screen, only with the existing content displayed.

You will be ready to start editing with the Block Editor.