Hi Grace,
A big Aussie welcome to Susan's family. It's good of you to drop in and say "Hi". Hope you like it here, and you stay for a while.
There is a mountain of information, resources and friendship waiting for you here, you just need to jump in start talking and ask any question you like. You're quite safe here and we are very accepting.
In answer to your question about post count, yes you are beyond the magic number.
Just before you talk to your family and friends abut your feelings, make sure you have some printed information about the medically recognised condition called Gender Identity Disorder GID. At least that way you won't get tongue tied when they start questioning you or worse case, deny what you are trying to tell them.
Looking forward to hearing more of your story in time to come, but in the meantime, be safe, well and happy.
Lotsa huggs
Catherine