Hi Brensim - it sounds like a great adventure you have planned so good luck.
Some of my thoughts are similar to those posted by a few others and I have a few extra thoughts.
Firstly, I'm not sure if you currently live in Aust or if you're simply planning to start a trip from here - this might alter what you can do.
I agree that you should try to get on a boat and do some sailing and the easiest way to do that is where someone needs a crew. The problem you might have is that you are a self-professed absolute
novice so it might be difficult to get someone to "hold your hand" so to speak. While I would certainly try a few big boat yacht clubs don't be deterred if no one wants to teach you.
Another alternative to trying to get a spot as a crew in a race, given your lack of experience, is you can try for a spot on a boat "backfilling" after a race. For example, my partner and I backfilled on a boat from Port Fairy to Melbourne touching on a bit of the Southern Ocean and Bass Strait after the race to Port Fairy had been completed. That at least gets you a day or so of experience to at least see what others do and and give you a slight feel for what's going on [and after that it might be easier to get a spot as crew on a race boat].
The next step if I was you would be to go on either a RYA Day Crew course or the RYA Day
Skipper (Practical) course. Both courses are approx 5 days live aborad and you will learn an enormous amount and you will be taught well by v good instructors. The
price for either course is <AUD2,000. There are a number of v good schools that I can recommend in Aust - message me if you want details [you would have to check whether you could do the Day
Skipper course without any sailing experience - it could be a leap too far too soon without any sea miles under your belt - in which case you could do the Day Crew course and you'd still learn heaps. With a RYA Day Vrew under your belt you should be much better placed to get a crew spot on a race boat]. As per one of the other replies, something like the RYA Day Skipper (Practical) counts as Evidence of Competence to get you an International Certicate of Compliance [ICC] without which you can't sail "bareboat" in the
Med [note: I think you also need someone on the boat - it doesn't have to be you - to have a
Marine Radio Operators Certificate to sail in the Med].
The other thing I would do is the Yachting Australia "Survival &
Safety at Sea Course [SSSC]" which I think is a must do if you're contemplating the voyage you described. Too many people die preventable deaths by making poor decisions that are best to avoid if possible (I hope I don't do the same one day but at least I know I've tried to get the theoretical knowledge and also some experience of use of flares, getting into a
liferaft while fully clothed in the cold ocean, etc.).
After all of that there's the reading - the sooner you start on that the better as there is sooooo much reading out there (it's also difficult sorting out what's relevant to you and what isn't).
I do realise what I'm suggesting is going to cost some
money but in the context of what you might spend on a boat and on the adventure I think they're a very minor part of the outlay and they will make a difference in preparing you a little bit for your adventure.
I was in a similar position 6 months ago (although I had many years of
dinghy sailing experience) and I'm heading down a similar path. The time has passed very quickly for me so I'd recommend you do as much as you can over the next 12 months to leave yourself up to 6 mths of voyage preparation.
Good Luck!