Maths with Physics Degree at Cambridge

I really do have a passion for maths which leads me to my dream of studying maths with physics at cambridge. However im quite unsure on how to ensure I maximise my chances of getting accepted - i'm aware cambridge is highly selective and looks for knowledge and skill in the subject more than anything.
I want to know what i can do to improe my maths knowledge. All advice is appreciated.

(I am a year 12 studying Maths, Physics, Further Maths and Economics. Achieved six 9s and four 8s at GCSE, english is my third language so apologies for any grammar mistakes)

Read this guide by the Cambridge University Maths department: https://www.maths.cam.ac.uk/undergrad/files/maths_with_physics.pdf

Make sure you practice STEP I, STEP II and STEP III papers.

Also, emphasise topics in Year 1 of the degree course in your UCAS Personal Statement. Because the admissions tutors will treat the interviews like Supervisions.

Read this guide by the Cambridge University Maths department: https://www.maths.cam.ac.uk/undergrad/files/maths_with_physics.pdf

Make sure you practice STEP I, STEP II and STEP III papers.

Also, emphasise topics in Year 1 of the degree course in your UCAS Personal Statement. Because the admissions tutors will treat the interviews like Supervisions.