Well IT has alot of programming, which has some maths requirements. Importantly, its about logic. If you did SDD, that may help you, but Discrete Mathematics can be a tad hard to understand as it doesnt resemble any mathematics that you have studied. You also have to do statistics, which is at least you hav edone in general.
Importantly, the maths here really is a foundation unit, they will teach you step by step, and that its abotu solving problems so you can apply them in programming.
I did some of it in my first year, and i did 2 unit, and though they lecturer said I had it easy since i did 2 unit, let me tell you, i go through it because i worked hard, i asked and consulted the lecturer for help and genuinely applied myself. So it may be dificult to understand, but if you do all the work and get the book, you'll do fine.
Search for Discrete Mathematics in google, so you can have a taste.
Also, most unis, including UWS, have maths support classes where you can ask for help, special and i think free classes for those who didnt do 2 unit to have a summary of 2 unit from the learning skills unit etc.
A link to the workshops/bridging courses:
LSU
Bridging programs
hope it helps.