Welcome Goldy,
You will be able to find any info you need on Skylines and the "Skyline life" in these forums, they're a wealth of information.
Firstly - Trojan motorsports Mitchell, ESP racing Queanbeyan, Autotech performance Fyshwick - All are great shops for servicing and modification around Canberra.
There are plenty of shops that will help you out with vehicle servicing but the three I just named above would be my first choices.
If you need info on keeping your new baby clean there are plenty of us that know a secret or two about detailing and if you do a search for "Detailing" on the local ACT forum you will find lots of tips to help you with the best products and hints to get the best result.
As for not leaving your new Skyline in places after dark - Dont ever leave it in ANY shopping centre car park for an extended period (if you go to the movies or something) because unfortunately theives target Skylines, try to avoid taking it anywhere near Queanbeyan too (their not so friendly over the border - joke).
Anywho, you should come out to the Museum one Friday night to meet us... We'll arrange to get as many people as we can out there soon.
Cheers
Mick