You will get homework tasks, but nobody is going to chase you if you choose not to do them. They are beneficial to you to boost your understanding of the subject and ability to complete exam style questions. Instead, they will simply not allow you to take the exam if they don't think you're working hard enough, because no college wants students who are going to ruin their results.
Just do it. Take responsibility for your own learning, and do it. You're not a kid at school anymore, it's not "cool" to rebel (was it ever??) the difference is that now these exams REALLY matter, and could help to decide your future, so don't mess it up.