You could try River City 4WD Club. Meet 2nd Wednesday of the month at 4WD Qld hall, Muriel Avenue, Moorooka. Meeting start at 7.30pm, doors are generally open from 7pm. Entry to the hall is the opposite end to the carpark.
Website is https://www.rivercity4wdclub.net/
Perhaps try the Facebook groups: Dirty Down Under 4x4, or Motley Crew 4x4 are two I can think of off the top of my head.
I'm in the same area and have joined 4wd clubs a few years ago but found they didn't really suit me (different age demographic, etc)