Join the club, go to Deca, you don't need a skyline to join.
If you don't know what Deca is, check "SAU DECA" on youtube, you'll understand
If you want to do tracks, Driver Dynamics does Sandown for ~$265 or so for a *massive* amount of track time.
Alternatively get a Cams license and join SAU events, Driver Training (ie. you can have someone else in the car with you) is around the ~$165 mark.
Keep it off the streets, and that includes your mate, Deca is about $80, its a big drive but a lot of fun