To attach images to comments, select the paperclip icon in the bottom-right corner of the box as shown here \/
Select your picture (Idk how to do this on the phone) and it will be attached to the comment. Sometimes other users cannot see this picture due to an error, but I've found this can be fixed by copy/pasting the picture onto a different comment \/
(Preceded was a URL to a custom Pokemon card I made for Alex)
I hope this helped!