Perth, Australia..... hmmmm oh I was just daydreaming about taking a trip there. Must be a nice place.
My advice is this: disconnect the battery before working on the car. This will eliminate most potential problems.
The other hazard with working on computer based electronics is static electricity. You should be fine as long as you stay with working on the stereo, lights etc.
Since you live on the coast, the humidity is most likely high enough to prevent static elec., but here in West Texas it's real bad in the winter months. I have to be real careful when I work on computers to keep static from zapping a processor or video card.
02 GMC Yukon SLT 5.3
02 Ninja ZX9R