This is an alternative to hntngirl's suggestion if you just want to display one pic. When you're creating a post at the bottom of the form "click " the box that reads; "Embed picture in post". Then "click" "Click here to upload". Next browse through your files to find the pic you want, highlight it, then "click" Open. Then "click" OK. The pic will appear in your post. You can preview it if you like before posting it.
To use hntngirl's method another excellent photo hosting site is
www.funtigo.com check it out. gg.