You have enough time to score good marks in your exam you should plan your preparation accordingly. 

If you want you can make your time table as well. 

You should complete your NCERT books first to build your basics and concepts strong. 

After, NCERT below are the recommended books for your preparation

PHYSICS

1-Concepts of Physics Vol I and II by H.C. Verma 

2-Fundamentals of Physics by Halliday, Resnick & Walker

3- Problems in General Physics by I.E. Irodov

MATHEMATICS 

1- Maths XI & XII by R.D. Sharma

2- Plane Trigonometry Part 1 by S.L. Loney

3- Plane Co-ordinate Geometry by S.L. Loney

4- Higher Algebra by Hall and Knight

5- Problems in Calculus of One Variable by I.A. Maron 

CHEMISTRY

1- Physical Chemistry by O.P. Tandon

2- Organic Chemistry by Paula Bruice Yurkanis 

3- Organic Chemistry by O.P. Tandon

Make sure you solve previous year papers to understand the exam pattern and level of the questions and practice sample papers as much as you can. 

If you want after completing your course you can solve bharati bhawan MCQs series. 

Good Luck!!

• Yes you can do that.But first clear your basic concepts and make your fundamentals strong.Arihant book is sufficient for you now to solve questions as much as you can.
• You can also join online test series program of good coaching institute during the last few months of preparations for jee.This will help you analyse yourself and strengthen your weak areas.
• Also,self study is very important.Make a proper timetable and give equal time to physics,chemistry and mathematics.
• Solve previous years questions and mock tests and be confident while attempting the questions.