I worked in Noble park for a yr n 1/2 recently & never had a problem. I worked with the refugees & migrants and they were always respectful and polite. I used to walk down the street every day to get lunch on my own and never bumped into any trouble. I'm a young blonde Aussie girl and I was fine.
The trains are always packed during peak times so as long as you're not catching the train at night I'm sure you'll be fine.
I'd have no probs working or studying in that area again.
Just be sensible I guess, prob was a bit silly of me to walk down the street on my own but I felt safe enough.