A/L Maths vs Bio struggle

I did biology for A/L in my first shy(2024) and got CCS. S for biology. I am not good at memorising or I don't know the way to do it efficiently. I were very good at maths that any of my classmates didn't get marks higher than me in my O/L and before O/L...but I like to be a doctor and but don't know whether it is hard or not but the thing is I am not good at memorising.no I am going to do maths 2nd shy in 2026(skipping 2025)...but I don't know the fields I can go in maths if i pass well...give some advice on this please. I don't have a hope🤕