Sorry guys, I know I said I'd do a how to, but I've been busy.
As far as car clubs go, do a bit of research. Some clubs cost up to twice as much as others to join. MG being a case in point.
I belong to NDSCC, and am a past member of HSCCQ. Both are great grass roots clubs, that are fairly active, with a reasonable membership fee.
NDSCC: More a rally based club, but also run motorkhanas mainly on the northside. HSCCQ does a lot of motorkhanas and khanacrosses. Both are good friendly clubs. If you're down the coast, Gold Coast Tweed Motorsport Club would also be worth a look.
CAMS licence: Level 2S which will get you doing any type of club motorsport: Pay your money and start playing. When/ if you want to Rally/ Off Road/ Circuit Race (That's race, not club sprints) then you require an upgrade and things get a little more complicated.
Just because you join one club, doesn't mean you can't go and do events that another club are holding. About the only exception I know of this are the NDSCC motorkhanas which tend to be "closed" events, and therefore only open to club members.
Lakeside: Be VERY careful of this place. It's very easy to take your car home as a small cube. It;'s an old school race track that is not forgiving to the inexperienced. Willowbank for all it's boringness is a far safer track due to its huge runoff areas. Lakesiode doesn't really have runoff areas. It has concrete walls, and there's not a lot of space if you run out of talent. Hugely rewarding when you get it right though.