Koala4444
Hi Koala!
I'm studying to be a science teacher, and I have undergone two science classes. I might not have the answer you're looking for, but I can give some insight.
A really big difference about university learning in general is that it's up to you to study. Lectures will cover content, in which you would take notes, but for further research and inquiry for assignments, you would need to teach yourself. Many lecturers will post helpful resources online for you to look at in your own time when you aren't in class, which you might take note of if you have a quiz. Lab classes also happen, which is always fun, but it's up to you to get the proper background knowledge beforehand.
One of my classes was in biology, and a bit of chemistry. I did VCE Biology, but no chemistry, so I had to teach myself the basics of biochemistry to understand more. A lot of first year subjects usually recap stuff taught in VCE anyway, (genes, mitosis, cell cycle, etc.). I enjoyed it more than in VCE, because I already had an understanding of biology, and could do further self-study. My lecturer was also extremely helpful and also shared pictures of her microscopy work. As for chemistry, I hear it's more enjoyable in university, because it moves away from boring fundamental theory, and gets a bit more experimental, but that's up to you to look into.
University is mostly about self study, and how well you can do it by yourself. You'll pass the class on lecture notes alone, but to excel (which doesn't matter as much in uni), you can do the further research