Okay, the workload is pretty intense, even if you have come straight from the HSC. You would not find yourself under as much pressure as the HSC, but the motivation to work gets ultra load due to a lack of feedback from your lecturers and tutors.
You will get a course outline and you will have to manage your time carefully. The main thing is not to procrastinate and leave it to the last minute, because you never have time.
The other problem is finding the readings. Every week, you will have something to read for all four subjects, and providing you can access them in the course reserve or if you are lucky webCT, you will still have a lot to read. Don't skimp on the reading because when it comes to exams, you will cop it hard.
If you choose Criminology as your major, you will still have to do other subjects within the Social Science units, external to the criminology major. This means that you can choose subjects in the field of psychology or sociology e.t.c.
Assignments are not overly excessive in first semester, but you will notice a dramatic change in the second semester, first year. The second semester Crime subject is a level 300 subject so it is much more demanding, and you will HAVE to do your readings because there are 2 in class exams. They are very hard as well and you will have to start early. The best is to do your readings every week. The referencing format is really complicated and you will have to adapt to that. Whats scary is that if you don't reference properly, they will give you zero and accuse you of plagiarism. You will have to find reliable sources, not just some website with unauthentic information. Bad if you have just come from the HSC and use to bullshitting (especially in English).