I personally would just go to ebay and read through, do a practice one, set it all up like you are selling it for real, you aren't charged until you hit upload on the very last page, so you can do the whole thing and if you like upload it, if not then it was good practice.
I taught my cousins father this way, he came over and did it on my acct, we just didn't upload. He then said, "wow, it really is easy and I could have done it myself." Ebay explains it step by step, if you are unsure click further on the page and read each little thing.