Should I change my course?

Hello! I'm a first year Criminology student and I wish to transfer to Ethical Hacking. However, I'm not sure if this is the right thing for me to do and I'd appreciate some advice.

I didn't choose Criminology because I was expecting the course to teach us how to be detectives like in crime shows (like some students thought), so this isn't the main issue. I wished to get a degree that would aid me in working with the police or for the government.

However, I found out that I can do that even without a degree and that I must meet certain requirements in order to get a job in this field. While this didn't discourage me at first, it was the assessments and grades that did. After getting a B on my first essay, I started attending an academic writing skills workshop provided by the university and applied what I learned in my next essays. I must note that English is not my first language and it's the first time I'm living and studying in the UK so I believed that this must've been the problem.

Despite the significant improvement in my writing skills and vocabulary, I received grade D on my second essay (still haven't had my other essays marked). I realised that the way essays are marked is very subjective and I don't find this fair. I don't think of myself as exceptionally bright but considering that I got A+ on my Law module exams I believe that I'm not a dimwit either.

After thinking about what I should do, I decided to transfer to another course. I talked with my parents about this and they agreed that I should try transferring to another course. I consulted a career advisor who said that I do meet the requirements to transfer to Ethical Hacking. I also did informatics in high school where I learned C++ programming and writing HTML in notepad, which I believe would help me understand the course.

However, my sister argued that I would not be fit for studying any subject that requires knowledge of programming and maths. She is a programmer herself and she's great in maths and physics, while I'm just average in these subjects. My high school education prepared me mostly for medical studies, but after failing the med school admission exam and doing one year of nursing school I decided that this was not the right thing for me and applied to study Criminology in the UK.

TLDR; I tried medical studies, then Criminology, liked neither so now I'm considering Ethical Hacking and I do have the right qualifications to transfer.

Would it be wise to apply for Ethical Hacking or would I just waste another year of my life?

Ethical hacking seems too specialised at bachelor level. I’d take some time out instead of jumping straight into another degree

What do you mean by too specialised? Also, I can't take time out, I already wasted a year with med school and now another one with criminology. My parents won't have it and they're the ones paying for my studies, I already feel really guilty about that.

so what did you do? did you enroll into ethical hacking?

You don't need a course to learn ethical hacking there are tones of resources online