Are you trying to put pics in your EE adds?
IMGUR seemed to be the easiest for me, and I'm not super computer savvy. A few quirks but they're easy to work around... Try it out and fire off any questions you might have.
I only have two adds in the EE and I'm going to attempt posting pics in them tomorrow. I've had good success posting into threads, so I don't expect it to be any different.