Hi Karen, I insert a little piece of HTML code into my post (sorry, it's an image so you'll have to type it out):

where "pull-left" puts the image on the left and wraps the text; you can make it "pull-right" and the image floats to the right.

"img src" would be the URL of your image; if you're using Steempeak just upload the full size and copy that URL into the code.

Then you can substitute your own caption on the next line.

Finally, if you need to give a source for your image, copy the address of the original after the "href=" bit.

Hope that helps!