There are many different kinds of writing required for study, from note-taking to analysis and critical discussion. Your writing skills will develop considerably over the course of your studies.
Writing is a large part of assessment at university, so it's worth learning to enjoy the process and thinking about how you might continue to improve your writing style. Accurate referencing is important in all academic work. As a student you will need to understand the general principles to apply when citing sources and take steps to avoid plagiarism.