First: register on the Donor Egg Agency websites and start looking through profiles. You don't have to choose, just start to become familiar with the info differnet Agencies offer and the types of women who are offering to donate. If you go for a country that doesn't offer you the choice (eg Greece) then obviously skip this step and go straight to teh IVF Clinic and talk to them about where they source donors from etc.
Second: Contact the/a few Clinics in the country and ask them questions about their processes, doctors, costs, timings, what happens if there are no eggs/embryo's to use when you are over there, everything you can possibly think of !
Concurrently: Get started on vitamins - 1000mg Vit E to improve your lining and pre-pregnancy like Elevit. If you have ever had any doubts about needing Immune help, get onto that in Aus NOW.
Then, enjoy the journey - it is nowhere near as overwhelming as it feels at the beginning.