The vast majority of things don't ever need the command-line. When things go sideways, command-line is the way to go. LinuxMCE is an entire bundle and it all installs beautifully, easily, etc. but some of the config can be a little daunting because it is such a huge system. Get yourself a good book (O'Reilly) or online tutorial. Linux is actually easier to administer than Windows in many areas. Scripting is a powerful solution to most problems. Embrace the command-line.
That being said, the vast majority of configuration in LinuxMCE is in a web page.
You can install your own backup system. I don't have any recommendations right now. I just periodically copy everything I need to a separate drive. There are tools that will backup to the cloud. A quick Google found tons including
http://duplicity.nongnu.org/index.html