in which order should i start studying my class 11 cbse maths so that i get benifited in both school exams and compitetive exams. please help, as i relay on self study and my school doesn’t start untill 2months but i wish to start now itself.

I would like to suggest you to choose topic wise individual books.
For Calculuc, go for Arihant Publication by A M Aggarwal
Coordinate and Algebra, choose S K Goyal...
Or otherwise go for Cengage Publication’s B M Sharma...
It will help you alot for both levels...
All the best