Study Abroad

I'm totally freaking out about study abroad. I need to find a program that will allow me to take the proper classes for my major and won't be too expensive. My parents are trying to pay for college and build a new house. They do not need to be spending a fortune on sending their daughter out of the country. I do have some money saved up that I could pay part of the cost with. I know I'll want to take advantage of the trip by going on extra excursions. Since I'm majoring/minoring in marine science, I'd like to go to Australia. I'm also open water certified and there is no way I'm going to Australia without scuba diving. But I know it's going to create plenty of extra expense. It's also awfully far away and I dont' know a thing about airfare. Still, I would really love to go. I think the experience would be amazing and I know it could really bring me out of my shell and open my eyes to the realities of my career choice.