Welcome aboard, Chuck. Glad to have you join us.
As for posting a picture, use the "Attach files" link at the bottom left of the message box. Click on the link, find your way to the photo file, select and import it, and select either "Thumbnail" or "Full Image." This forum makes it easy to insert photos inline (within the body of the post).
You will find several threads on inserting and editing photos here:
Communications from the staff
rvforums.com
TJ