The original template I chose did not have a background, so I went back into the site publisher and changed the template.
Then, I found the file I needed to change and found another one to put in it’s place.
I had lots of trouble and after going to the Reclaim Community page, I found out a post from another newbie that was having the same trouble that I was. Apparently, the CASE use use is VERY important. I had .JPG and it needed to be .jpg
Once I changed the case, it worked perfectly!