You're not really going to gain expertise in a specific area without years of practice.
Like @ASHM and @HAWK I'd recommend the broader UNSW Art & Design degree. Two reasons:
* It's a design-focussed degree. To produce great UX designers, and for UX itself to mature, we need to stand on good design foundations, and design school is the most appropriate place to learn those. Some mistakes and explorations can only be done without commercial pressure, and it's important to start off with proficiency in design before heading into more specialised areas like interaction design.
* Early in a UX career you want to look for broad and general experience that lets you build up good generalist knowledge, as well as exposes you to an array of options you can later choose to specialise in. This still applies to your first jobs after graduating.
Underpinning this is my belief that uni (and an undergraduate degree in particular) is about exposing yourself to ideas and having room to discover who you are. There's a lot of pressure to skill up ASAP, but I think discovering and fostering your aptitudes is much more important or you're going to regret wasting 3-4 years.
I gave some advice to @Silver_Queen over in another post, that is worth repeating for you here:
At the end of the day it's a piece of paper, but it's effects on your career should be felt years down the track. So, the major criteria I'd assess any degree against would be it's impact on you, the student:
* Do you get a good, broad exposure and formal training in key areas that you'd find hard to give time to when actually working?
* Does it launch you with some practical skills and good habits that stand you in good stead for the future?
* Does it match your personal aptitude and foster passion and fluency in the topics?
* Does it allow you access to an influential network of people you can grow with?
Master's level study is going to push you to think about stuff, so 'basic' skills like learning to code will largely be assumed. You shouldn't consider a Master level degree until you know the topic area you want to focus on WITHIN a specialisation.