Welcome to the site Tim. The best way to gain the experience you need is to join a club or failing that just go out with some other 4wd'ers who can teach you. Above all remember to have fun and if you have any doubts about a track, TURN AROUND. Next time I'm heading up your way for a run I'll give you a call.
There is a section for newbies, in the forum, so have a look in there for some good tips.
Noosa is a lovely part of the world, so you will get to explore some great areas.
When you are heading out you can post in the trips section and see if there is anyone is available to come out with you. It is a great idea to take someone with you in case you end up having too much fun
Don't worry about the Landy, Goldrush will polish up his tow hooks, ( oops! that might rattle a few cages ) you Queensland guys ought out meet up somewhere, I know it is a bigger state than Victoria, but make a weekend of it !