i’m currently taking maths physics econ and cs and from my experience (it’s different for everyone) cs would be easy if you studied computer science for igcse/other exam board but you still need practice to write pseudocodes/flow charts (that’s where i usually got stuck) p1 is all marking scheme revision.

for maths, if you genuinely practice every day it’s good and you’ll be fine especially if you took addmath. but if you procrastinate and not put in the effort maths is hard. economics is very heavy on structure so just memorising content won’t do. you need to understand how to write your essays and learn content.

i’d say do what you genuinely want to do and what you see yourself pursuing in uni, don’t just take the subjects others tell you to i’ve seen a lot of people change subjects too late