Hi Jan,
Firstly welcome I'm one of the Aussies Ellie was telling you about. The rest should be waking up soon, you will find you have more brothers and sisters then you would relies down here scattered across this wide brown land of ours
I suggest counseling to figure out where you fit on the gender spectrum. I know in nsw some psychologist do bulk bill but the waiting list may be quite extensive, so I suggest you ask your gp for a referral to one as soon as possible. (The slight downside to this is they may not have experience in gender issues)
If you haven't already seen someone and you live in a capital city the gender center is another place to talk to someone who understands. They can't help you medically BUT a friendly ear sometimes can be just as good especially when you are starting out.
How to come out again, well I've never been one to call a spade a 'digging tool' it's a spade, (actually in my hands its an instrument of mischief, chaos and destruction

). What I'm trying to say is be up front and tell them this is happening. Of course this is a lot easier once you've figured where you actually fit in the gender spectrum and are more confident and sure of yourself.
How to be a man, open your eyes, look and see. People come in all shapes and sizes just strive to be a good human being. Once your comfortable with yourself the rest will eventually fall into place.
Hope to see you around the forums soon
Gypsy