A degree course at university should be to learn more about a subject you really enjoy. If you study something you enjoy and succeed in, you’ll likely be more motivated for the independent study and challenging material that comes with any degree course.
When weighing up whether to apply for an arts or science course, you should think about what you enjoy more, what you do well in and what would suit your way of working.
Arts degrees tend to involve more essays and independent reading.
Science degrees have much more regular, compulsory contact hours and the course content is similar for most students.