No previous experience of the subject is required. Nor does Philosophy particularly suit students with a preference for the arts as opposed to the sciences, or vice versa. Many good philosophers are also strong in mathematics and/or science; but equally many lean towards artistic or literary subjects, or the social sciences; many, too, are linguists. Philosophy can in fact be combined successfully with almost any other subject or subjects. The skills of analysis, careful, logical, methodical thought, and clear presentation are useful in all areas of study. At university, Philosophy is sometimes studied on its own; but it is much more frequently combined with other subjects, including Politics and Economics, as in the very popular PPE courses offered at various universities, Maths, Physics, Theology, Psychology, Modern Languages, and Classics.
Obviously, the first requirement is that you should be interested in finding out more about at least some of the sorts of questions with which philosophers concern themselves – and in particular about the four main areas on which the course is focused – see the section on ‘subjects’ above.