Let’s add an image, so scroll down the blocks picker until you see the Media section. Click the “Image” icon there.
You are now prompted to browse to select an image to add to your lesson, either from the WordPress Media Library (if you already uploaded your image there), or you can upload a new image from your computer / laptop.
When you’ve chosen an image and have it on your page, you can grab the little circle handles and drag them to resize the image if you want.
You can add an image caption if you want.
