Hi,
Even though you have GCSE English Lang & English Lit B Grade's, the English taught on the Access Course will most likely be taught at level 3 standard, which is the equivalent of A levels.
Don't forget, even if there is fewer options on what to study, it is only for 9 months, you need to pass the course, studying what ever they throw at you TO GET into university.
Pass as many units as you can, to the best of your ability. Do not put Psychology down, because you may not have wanted to study it. Psychology itself will help you to understand how to research in a detailed manner and understand concepts of Psychology and other academic subjects.
English Study skills will help you to write up reports and learn about yourself, your strengths and weaknesses on which you can improve on and write on your personal statement for university.
Maths is a core subject, you thought you do not needed to study maths?
If you have GCSE Maths C grade, and it is from the last 3-5 years (I think max 5 years), then you can skip Maths and get the units automatically. Check with your college/ and your university courses.
Some subjects are compulsory for a reason. They have been doing/teaching Access courses for a whilst.
Can I just ask, how you can be skeptical before you started the course?
I have found by experience, it is easy as anything to get into an Access course, but passing it to get into a health related degree, is another matter.
Hope that helps (and not caused any offense).
Jiraya.