I would say 95% of the members joined not knowing anyone. The club is very welcoming to new comers so feel free to join up.
I joined up and didnt know anyone as I had emigrated so only knew my g/f, no mates, nothing.
Come along to a monthly meeting at the Bells that details are posted up of a couple of weeks prior to, in the Vic main section. If you like it, pay up and join.
My advice, take the gamble, pay $70, come along to as many events as you can and before long you will be part of the furniture. The club is a social club formed off the back bone of an interest in cars, I would describe it as.
I make no claims to be the world's most confident person but come on your own (you will be easier to approach) and look for any of the committee to introduce yourself to. Or perhaps the two of you meet before hand and come together.
Events are easier to meet people at but the easiest way to meet people is don't try and prove anything. Most of us have performance cars so just come along and be yourself.
HTH