Hi Nathan,
Sounds like you have the gear sorted. We are lucky to have at least 3 astronomical societies in Brisbane. Check out Brisbane Astronomical Society, South East QLD Astronomical Society or Southern Astronomical Society. BAS and SEQAS hold thier meetings and public viewing events on the north side of town. SAS hold their events on the south side. I think there is a group working out of the Redlands area as well.
www.bas.asn.au/index.html
www.seqas.org/index.html
www.sas.org.au/index.html
All these groups are going to provide you with a great chance to learn the trade with experienced observers and astro photographers. All of these groups have a lot to offer.
I joined BAS and can vouch for their willingness to assist new members.
Regards,
Stu.