The interest you take in creative writing, just as with any other form of artistic expression, and how far you will ultimately go with it, is determined by the dedication you are willing to bring.
You first might consider that, regardless of what sort of course you're pursuing in academic terms, you're probably already doing a lot of writing! True, you, and perhaps others, might not think of it as being creative, but, it's generally true that creativity is borne of the guidelines and limitations of what, why and for whom one is writing. In other words, it is ultimately about being able to convey one's ideas in a holistic and clear manner given the constraints of the form and instructions one is given.
Of course, writing is a medium like any other, where it is possible to improve and refine one's technique and style over time, and so it behooves one to first take stock of one's position in regards to it; where you are coming from, in other words. What has your background, academic, professional and personal, made you passionate about? Is what you want to write about in a creative setting connected to your academics and your other passions, and how so? In other words, what can you bring in that someone without your specific academic background could not, and more specifically, how would it differ from someone specifically training to be a writer as such?
Obviously, the answers to all of these questions will differ quite a bit depending on the exact program you are in, and your own life outside of it, but they are important ones to ask regardless. You may also want to take up an analysis of the creative works that you have personally responded to in the past, and what exactly it was that made them so impactful. This is not to say one should merely copy the techniques of others, but this is often an immensely useful exercise in order to get a handle on how what one considers “good writing” really comes together in a concrete sense.
Nevertheless, as in anything else, getting better requires dedication and effort put in, and I can speak from personal experience that the satisfaction one gets from writing is directly proportionate to the time committed to the task. Thus, I've always found it good practice to dedicate a set section of time to writing each week; not long, just an hour or so, but the concentration it provides can help immensely. Moreover, get into the habit of recording the snatches of ideas, or particularly adroit turns of phrase that might come to you in the course of the day. Some of the best and most creative ideas come to us as a result of our daily collisions with the realities of life, and it's a shame that so many of them remain ephemeral. The traditional way of accomplishing this would be via keeping a note pad, but typing out a quick jot on one's phone works just as well and seems a bit more apropos to our modern age.
The most important thing to remember, though, is that you are already a writer in your own way, with your own unique voice and style, regardless of if you define yourself as such or so. The perspective you bring will, of course, not be the same as theirs, but this should be seen as a benefit rather than a detriment. The interest you take in creative writing, just as with any other form of artistic expression, and how far you will ultimately go with it, is determined by the dedication you are willing to bring.
So, how have you come to writing, and how do you keep it in balance with your other interests, needs and obligations?