How easy do you think this would be to do?

I never did it at A-level and have regretted it since. I might study computer science or some kind of data analysis course at some point in the future so it feels like it would be useful.

Would also just be nice to have another A on my CV. I did mostly doss subjects you see.

Do you think i could study maybe 5-10 hours a week around my job/life and hope to achieve an A within a year? Or am i grossly underestimating it.