On the upload error message, head for
Tools > Upload/Manage. Try changing the server name from
ftp.aa4m.com to just
aa4m.com, then connect to your host. On most web hosts, that works just fine. In either case, once connected to your host, navigate to the directory that holds the root of your domain - on most hosts, that will be
public_html. Then click the little "folder with a globe" icon whose tooltip is
Mark as web root.
Using the
Custom style of
Saturn, you can provide an image for the background of the body of the album page. But it's set up to treat the image you provide as a small texture file, repeated over the page as needed to fill it. This is intentional - I'm always a bit mystified by people who create an album in which they want visitors to look at their photo's, but then clutter up the page with large, distracting elements.
But, if you insist.... As the body background image, make sure you choose an image that's large enough to completely cover a large monitor. If you've got an image that's bigger than, say, 4000x3000, that would be best. Otherwise, the image will get enlarged into blurriness on a large monitor. Add that to the album on the
Custom tab of
Saturn. Then go to
Saturn > Code > CSS, and enter:
html {background-repeat: no-repeat; background-size: cover;}
On the subject of the
Credits link,
RobM has addressed that.