Yes, definitely you can crack IITB CSE with 2 years of consistent hard work, however these JEE Advanced Toppers start building on their dreams from Class 9. Join IQ or IIT Foundation Courses whether online or offline as well as Solve Mathematics at a Higher Level besides Contesting various Olympiads and Examinations like NTSE.

Back in 10th, I had a very close friend who went to Kota after Matriculation. He joined one of the best coaching institutions there and ended up with AIR 39 in JEE Advanced 2018, besides securing CSE at IITB. He had started Online IIT Foundation courses of Mathematics and Olympiad Preparation, since Class 9-10, besides performing strongly in Board Exams and later worked off the last 2 years of Preparation.

Mathematics is perhaps the only subject till Std 10, which can be a real test of IQ and you should atleast start with IIT Foundation Books for Class 9/10 as they really help you increase your thinking ability, IQ and speed as basic foundations for Core IIT JEE Preparation from Class 11.

For more information about JEE Advanced Preparation and Tips do follow the link below

https://engineering.careers360.com/articles/jee-advanced-2021/amp