Welcome ladies!
With the new laws passed in January, both Mum's can have their name on the birth certificate, just need to sign a stat dec as the non birth Mum saying you consented to treatment to conceive baby together, thereby awarding you all the rights of the bio mum HOORAY!!! Doesn't matter what state either, it's a federal law.
The same laws now give access to lesbian women for accessing IVF including annonymous donor sperm if that is the way you want to go. It's a more expensive option, but you are covered legally in terms of there is no recognised father who can later sue for custody and there is no one to contest you both being on the birth certificate. If you know who the father is ie a known donor with at home insemination, or using someone you know and going through an IVF clinic, you legally have to name him on the birth certificate.....
I would definitely recommend getting a referral from a GP for a Fertility Specialist and going to see someone to ask about surrogacy etc as they will be able to give you accurate info about the possiblities, cost etc. If the one you speak to seems anti lesbian mums, just go and see another one until you find someone who can help you.
Melbourne IVF are really gay frendly, but with the laws coming in, they have a shortage of donor sperm, as do most IVF clinics as women are taking advantage of the new access.
Good luck on your journey girls!!