You can apply for BCA course it doesn't require maths as a pre-requisite. There are many Colleges for BCA that you can apply for example: christ university etc

Hi, Christ University Bangalore offers a 3 year  BCA ( Bachelor of Computer Science) , eligibility for which is a pass in class 12. Maths is not a pre requisite.
Check out more details here https://christuniversity.in/sciences/computer-science/bachelor-of-computer-applications-(bca)/250

For maths u should be very clear with 11 and 12 ncert and u have to learn the shortcut methods for each chapter this will be by practicing only and every book is best arihant or rs agarwaal  


Thank u I am sure u r satisfied with my opinion