Thank you all for the warm welcome and information. I have been forewarned about the sometimes eye watering financial side of this hobby/passion/work.
For a budget I don't really have a magic number in mind, for the right gear I am willing to spend a bit of money but at the time understand there's no point in buying a $10,000 camera if I cannot get decent photos with a $1,000 unit. I personally would have no issue with starting out on second hand gear, it was suggested to me by a few photography friends so when upgrading time occurs I don't lose as much on the resell of gear.
I would like a camera that could do both wide and macro I think. I'm lucky enough to be a short drive from dive sites that are home to amazing organisms such as grey nurse sharks (sand tiger shark), weedy seadragons, cephalopods, eels and much much more.
I would agree that I am still new to diving, I have 64 dives under my belt but 100% plan on diving for as long as I can.
For the time being this would be just a hobby of mine with most captures being posted on social feed (if I manage to snap an okay shot). I am currently studying marine science with the intent of at least doing my masters, if I am lucky then maybe I can tie this all together someday but that's still a ways to go.
I'm definitely a novice when it comes to photography above the waves. I do have access to a Panasonic Lumix DMC-G6 and a good friend who loves land based photography so we have been trying to work on this. Unfortunately due to Australia's most recent lockdown and my work situation this has been halted for the last 3 months.