Some of them do, and some of them don’t. The fact that you got put into Dickson means that you are significantly out of area, so this will hinder your chances quite a bit.

My best tip to you would be to bluff. Narrabundah is the only school which offers things along the lines of environmental sciences and ecology, so you could always pretend to have a burning love of them.
Also, their photography school is meant to be great as well (I never did it, but a few of my friends did) so you could appeal to their vanity and say that you want to do that as well

Because they work in a trimester, you can easily do both Environmental sciences and photography for your first semester, then drop them for your second and still make up majors in whatever you swap them for (as they cannot UNenrol you if you make it though the appeal)

I hope that this helps!