Found yourself in the new WordPress Block Editor format?
To get back to the trusted old Classic Editor, try this:
Click on the W My Sites logo, top left of your page.
That brings you to an Admin Overview that has WP Admin at the bottom left of the menu list.
Click on that.
Now you are in the old WP Admin format Dashboard.
Click on Posts – All Posts
Save the browser address onto your favourites, or Bookmarks (I’ve saved to both)
This new link should get you back to the old format Classic Editor in future
(and hopefully, help your sanity)