Place your cursor over the image you want to copy and double click (with a mouse) or two finger it if you have a laptop.Are these instructions for an Apple??
On Windows; you right click the image and a menu appears with a lot of selections in it. Down at the bottom of them is PROPERTIES. Select it and the URL address of the image will appear in another box.
Copy it, then...
...your, "I don't know how to post a pic." days are OVER!
You do NOW!!
between the QUOTES, and you're good to go!
<img src="">
giving you...
If you want your cursor to display a message when on the picture, than add THIS
alt="" between the img and the src text with your messge inside the quotes like this: