Adding an Image Using New Editor

Adding an image from your computer:

Follow same steps as in old Editor except be sure to click on the picture that appears in the window.

Adding an image from the web:

For now, it is easier to to go to settings and select the old Editor and then upload the image.

If you do need an image from the web, work around it by uploading the image to your computer:
Right click on selected image.
Select Save Image as...
Type in a meaningful file name.
Save.
Go to New Post.
Click on image and download the image from your computer