In case you read the news, the boy who constructed its fusion reactor at home did not reach a point where he generates more energy than the fusion outputs. Nobody has constructed this type of reactor yet. And claiming the output energy is even further down the road.
Still it is possible to construct one that demonstrates fusion itself, even if the output is negligible. I don’t think you can find a guide or tutorial that explains in detailed steps how to build one, so you will have to learn a lot and design one yourself. A hobby group on the internet could help, I don’t know where to find one, but try looking here:
http://49chevy.blogs.com/fusor/2007/01/what_is_this_si.html
or
http://www.talk-polywell.org/bb/index.php
