Minor nit. A Google Drive link is not an image file.
You can use the URL tool to include the links in the message which requires you to click on the link so not my preferred method.
https://drive.google.com/file/d/1qkm...usp=share_link
https://drive.google.com/file/d/1hBD...usp=share_link
https://drive.google.com/file/d/1yKq...usp=share_link
The easiest way is to use the paperclip in the tool bar or the Attach files in the Additional options. See the attached thumbnails box for an example of doing this.