Hello, hopefully I can share some information about my experiences which will help you in some form, shape or fashion.
Before I continue, I would just like to point out that the advice given by threeportdrift is superb - it is clear, succinct and accurate.
A couple of years back I was deciding on whether or not to enrol on an Access to Higher Education Diploma in Art & Design, or an Access to Higher Education Diploma in Computing. I chose Art & Design, with the intention of focusing my studies on the use of design software. I completed the course, gaining a number of credits at merit level, and subsequently went on to study Digital Art at the University of Kent. I felt pretty miserable and isolated during my time at Kent, and found it hard being around younger people who possessed a distinctly different outlook on life. To me their optimism and positivity sometimes translated as naiveté and idealism, but perhaps I was just looking at things from a slightly more cynical and jaded perspective. Anyway, I also felt that the level of teaching and support was severely lacking, and I could not justify the level of debt I was getting myself into, so I left after about six months on the course. I would like to point out at this point in time that these are extremely personal experiences and observations, and just because this happened to me, that does not mean it will happen to you should you decide to enrol on an Art & Design course and continue on to a related degree course.
Obtaining a creative job is as much about your ability to be persistent and strong in the face of adversity. Experience is also a valuable asset when looking to gain employment within the creative sector, and it goes without saying that a certain level of business acumen is vital if you want to work within the constraints of professional creative services which cater to the business needs of clients, organisations and companies. A degree is only one part of the puzzle, and of course, there are bound to be some people working within the creative sector who have built highly successful careers without degrees.
A career in computing does not necessarily translate as a job role which requires extremely high levels of numeracy (computing roles can be very practical and hands-on), but should you decide to study computing at degree level, you will inevitably encounter various mathematical concepts which relate to the operation and science of computers. Computers are fundamentally machines which rely entirely on processes linked to mathematics, and although programming languages introduce various levels of abstraction which remove the need to understand assembly language, you may still find yourself occasionally referring to and utilising some form of math.
I have decided to go back to basics and try to improve my GCSE grades, and will then consider doing another Access course which will hopefully lead to enrolment on a vocational degree course. I am quite risk adverse, and so I will now only try for a degree if it is directly linked to a job which requires a degree.
I don't want this post to be construed as a cautionary tale. Hopefully it will just provide some food for thought. Ultimately what Access course you choose to do will be your decision to make and yours alone. Weigh up the pros and cons, and try to be as clued up as possible throughout every stage of the educational journey. Good luck!