Focus on all your subjects right now and score well in boards and IIT JEE.For any interest you need to get a good college to study and learn.Get an IIT then you can get a good company and good teachings as well in the college.Right now get good marks.

Hello

Raftar

Not required particular subject in class 11 for automobiles, you just make attention on your studies and get prepared for entrance after 12 and u can opt Automobile engineering. If you are interested in side studies and having time then there are some books I will give u some additional books



Design of Machine Elements Mechanical Engineering Design machine Design fundamentals and applications

Thank u

As per Now,

Basics Like Solid Mechanics,Machine Design.

And Then,

Automotive Petrol And diesel engines,

Automotive Chassis,

Electronic Engine management.

Automotive Electronics,

Automotive Transmission and Hybrid Vehicles.

all subjects you covered carefully