Sounds like maybe an immobiliser/key problem. Just check that tiny metal part coming out from your key makes contact with the ring around the ignition and the flashing light on your dash turns off.
I found this helps alot.
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.snapontools.com.au/__data/assets/pdf_file/0009/19278/Holden_Engine_Troubleshooter_Reference_Manual.pdf&ved=2ahUKEwjGlLvZmeDsAhUc8XMBHRBHBNEQFjAMegQIDRAB&usg=AOvVaw25UkWBcLeiUsL0vJ7WQXQp
This is something i found to be invaluable when working on my vr and vs. Its a text version of snap on's diagnostic troubleshooter for vr vs commodores.
It shows you how to correctly use a multimeter to test various circuits, relays and parts.
Step by step guide for finding faults and problems...