Using Wiki Sandbox

I have no idea what happened but I reinforced my blog link which was already visible!
I tried to join and then thought maybe we didn't have to .....................
Maybe I'll go back later, I thought this would be easy..
I added a photo but in the process messed up someone else's entry, and the text I added and saved does not seem to be there.
This does not live up to the hype of how easy it is.