Hello!
For my bound reference, I had a document my teacher would give to me from one of his top students from the year before (40+ ss) so I was fortunate enough that I didn't have to make my own bound reference templates. For reference, it was like a grid and I would put the definition on one side and an example of a question or insert a relevant image (eg, bar chart, what they were used for...)
I binded some extra pages in the back to stick some questions if needed be after doing prac exams.
Some people will say that writing compared to typing up your bound is wiser but you do you. For my first sac, I wrote in an A4 book for my bound reference but it ended up getting really messy so I began to type my notes up for my second sac.
Yup, you can definitely get it binded at officeworks! I was lucky that the head of senior school had a binder in her office so she binded it for me.