Yep, best way to learn is to read the code of some of the addons
First thing is to set the content type, I'm not sure of all possible values but most of us only use:
None - it's just a menu list or other non-defined list
Use this command to set the content type...
Speed should be more than fine, so if your wifi has good connection then you can rule it out
But, just for us to help you verify, you can do a log or even just take a picture of your screen where you added fusion.. if you get a connection error then it's definitely a typo somewhere, or wrong...
Smack your friend for installing that crap on your box.. pronto!
Better option is to do as suggested here with fusion, next time you can give us a log or a screenshot so we can see what you were doing wrong
I wouldn't bother with the powerline adapter, but worth a shot at least.. buffering...