My advice, just put down any courses you want but I would avoid UWS, it's not ranked too greatly according to the good university's guide. Given you live at Wadalba, you might consider university of newcastle ourimbah campus as it offers a bachelor of commerce degree from which you can major in mangement. Moreover, UTS city and kuringai campuses, USYD and UNSW and ACU mackillop campuses are all much easier to get to than UWS all with good reputable rankings. You don't need to worry about getting a high enough UAI as University of Newcastle and ACU both have lower ATAR cut offs. In all wish you luck in your hsc.