Hello Alfiya

If you want to score more, with less effort then go with Information Practices. Because if you know basic programming, then you don't need to solve complex problems here. You can score 90+ easily.

In CS, there are a lot of concepts to learn and the syllabus is a lot more tough than IP. But you'll learn the concept which may help you in future.

Long answer short:

Want to score in 11-12th only, choose IP,

Wanna choose computer science in B. Tech or B. Sc, then you need a strong base, and I'd recommend CS.