Hi Ankit, 

               It's totally depends on you. If you can manage both at the same time, then go for it.

Look , jee mains & Advanced & 12th exam preparation are slightly different to each other, if you are serious about your studies I believe you definitely can.

You can join Fit-JEE for preparation.

Best of luck! 

Hi, Your question is valid and on the other hand is a common thought process of students of your class with the same aim.

It totally depends on your interest and how well you can balance both the major responsibilities.

While the fundamentals concepts of all the subjects remain same in both Boards and JEE Mains. Only the difficulty level of the questions are a little higher for JEE. For both the exam conducting body is CBSE. The relaxing part is the syllabus for jee mains is 11th and 12th syllabus while for 12th boards is your 12th class syllabus.

You should understand the purpose of both the exams. Jee mains is conducted and meant for removing the average students from the admission process whereas in your 12th boards even the average scorer can perform well as the level of the exam is moderate.

To manage both, build your confidence first and then a systematic and planned routine. Give your targets and plan short and long term goals. Make notes and write formulas separately. 

And also give online and offline mocks to revise and practise each section, unit and even syllabus.

I understand its not that easy and can become hectic too but if you plan from the very beginning then things can turn smooth for you.

Good luck.

Realize your class 11th basics first if you are okay with that then i don't see any harm in taking the coaching class.

but I must clarify first that it will not be an easy task to work on you will have to devote at least 7 hours a day in order to consolidate the syllabus of 2 years subjects.

well, nothing is impossible in this world so nobody knows to try to keep class 12 studies a bit separate from the IIT 's preparation well if you can muster class 12 subjects with the coaching it will be like icing on the cake and won't each much of your time.

hence time management and hard work will play a very important role.

all the best !!!