Rosebud69, you seem to be having trouble - let's see if we can help.
Click on "reply" and type a message. Below the window where you type your message, you'll find a heading "Attach file" and a "browse" button. Click that button and find your picture file and select it. Then send. (If my smiling face doies not come with this reply, I've got it wrong and someone else had better advise.