The first thing I'd say is that you definitely want to be studying something you enjoy. Perhaps look at a few universities that offer a cyber security degree and see if they have any videos or module descriptions to see if they pique your interest. While money is important in life, it isn't worth being miserable if you don't actually enjoy the job after.
If you are interested in forensics, I'm sure the police always need forensic staff all around the country, so I can't imagine it would be impossible to get a job.
Most IT or Computing based courses typically teach from the start if not otherwise stated, so not having a background in IT shouldn't be too big of an issue.
Any degree will have it's difficult moments and it's easier moments, so I don't think it's possible to simply say whether the degree will be easy or hard. Similarly, the university choice isn't always about rankings (often rankings are a load of rubbish) as you need to feel comfortable and happy at the university itself. Usually I would encourage going to an open day, but with current restrictions that's a bit difficult - perhaps look on YouTube and see if there are any past or present students that have talked about their experience to try and get a feel for how it is.
Legally, your sex cannot decrease employability chances. As long as you have the same qualifications as someone else, you have the same chance as them and would just have to prove your worth.
As for pros and cons, clearly cyber security is a highly important field currently and there will always be jobs. As for doing a specific cyber security degree, it may limit your career choices compared to perhaps doing a computer science degree as it is solely based on one field.
I would recommend having a look at the GCHQ cyber security apprenticeship degree as this may be a better option to study, work and get paid.
Sources: 3rd Year Computer Science student conducting research into Cyber Security, GCHQ Careers page, family relations in cyber security field.