Bob,
You have clearly stirred up some interest. To post a picture look at the tools when you get the screen for posting a reply. To the left of the you tube image is a scenic picture. Click on that and a box will drop down.
In that box click on “upload” and it will pull up a page on your computer where you can locate the photos you want to load in the reply. Select the photo and then you should see it in the preview screen on the drop down box. Click OK and it should load on the reply. Then you can add narrative, add more pictures or do what you want until you decide to “post reply”.
If you have trouble let us know and somehow we will see if we can walk you through the process. I figured it out so you sure can do it.
I forgot to mention, please spread the word among the other converters such as yourself because we all are going to benefit from our diversity of ideas and conversion backgrounds.