JEE Preparation

Yes, you can but I would rather suggest you to focus in your board exams first. Because, you can appear for CET again, but not in your class 12th boards. According to my experience I am telling you this.

Yes, the JEE preparation books are more than enough for IISER. All the exams for IISERs are designed to test very basic concepts. Most questions are on the easier side if you are preparing for JEE.

Hello,
Kindly visit on Shiksha college predictor:
https://www.google.co.in/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor&ved=2ahUKEwjPs-iFqpTcAhWMRY8KHariB-kQFjAAegQIBBAB&usg=AOvVaw1N9BzFtyUCP4JU-2UQHQ0H.

If you want to prepare for IIT-JEE I suggest you to go for FIITJEE or resonance.

Resonance is best for preparation for IIT JEE because they have best faculty rather than FIITJEE and Eduserv.

Just read the concept before solving the questions of a particular chapter. After that try to solve the questions as much as you can.

Please follow Arihant. This book is named as RD Sharma objective for IIT-JEE mathematics.

Grab this college. IET is one of the best college of Uttar Pardesh, and it is much better than some of the NITs and no doubt this college has a very good placement track and awesome study and entertainment environment.

If u want higher education prepare JEE, if u like normal education mean go with hsc.

You can try Akash, Janakpuri. Though they are an English-medium institute, if you raise your problem, they will teach you in normal day to day language.
Plus, they will help you improve your English as in engineering. Almost every lecture is taught in English only
or else you can join any local institute.
All the best.