How to insert text before a table that is at the beginning of a block
If a table that you've created is the very first element in a content block and you'd like to insert some additional content before it, you need to use a special technique, described below.
First, roll the mouse over the table without clicking it. A red dotted line will appear at the very top of the editor:
Now click this icon on the top right:
It will insert a paragraph above the table, so you can then enter your content: