hi! youre not bothering me at all! heh, i had trouble figuring out how to do it myself actually, but its quite simple.
First, paste this code: <img src=image url> into your description box, where you want the picture to be (i.e, above the text, under the text, whatever) Find the picture you want in your description, open it in a new tab and copy the url. Replace the words image url of the code with (believe it or not) the actual image url.
Thats it! Save the changes you made to your blog, and exit the customise tab, and your image will be in your description ^+^