That depends. A series of fails/just passes for your first year would look bad... but you have 2 distinctions, a pass, and a fail (in a unit that doesn't have much to do with Journalism). Plus, you had a high enter. I don't think you'd have too many problems changing. And if they interview you for the chanage and ask about the fail, just explain that it was your first year of uni, independence, and you took it a bit far. Now you're back on track, and focused on what you want to do. Some BS like that always works well
By the way.. I'm no professional of any kind in these fields.. I was at uni for my 3 years, and an RA for two of those years (so I heard quite a few stories of how people did / their marks / what happened to them).. everything I'm saying I'm basing off what I'd heard/seen myself at the uni I went to (not Adelaide). So yeah.. no gaurentees.. but I wouldn't be too stressed about it anyways
Now go study for the Supp. hehe.