Im thinking of becoming a CFA when im older but dont know how to start or when

So im currently in year 11, and im thinking of becoming a CFA as my future career but i don’t know which path i should do. Should i be getting a bachelor’s degree? And if so in which course?
I also saw that ill need to do a CFA program but when would be the best time to do it? During Uni? After Uni? During college even?

For my college courses i have decided on economics, law and maths. Considering further maths too but not sure as of yet.

Please can people give me advice on where i should start and what is best to do.
Much appreciated.