It's actually quite simple.
You'll need a router, wired or wireless I quite like the Billion range and the 7202G is priced quite well for a wireless router, if you only need a wired solution, the 5102 is quite a capable unit
as for setting everything up, just go into the settings of your router (read the manual) and fill in your ISP username and password
Other than that, make sure that the following settings are set and you'll be ready to go
VCI : 35
VPI : 8
Encapsulating Type : LLC
Protocol : PPPoE
If you have any problems, just come back here and we'll be more than willing to try help