Hello Gowtham,

Yes, you can start your JEE preparation from 10 th standard itself. Try to study for 4 to 5 hours each day for JEE exclusively. After you go to 11 th and 12 th standard increase the hours to 7 to 8 hours per day.

As you belong to Tamil Nadu Domicile I'm providing you information about best JEE Institutions in Tamil Nadu.

FIITJEE, Chennai

Master JEE IIT Academy, Vellore

Akash Institute, Tamil Nadu

For information about best books for Physics, Chemistry and Mathematics for JEE preparation go through below mentioned link

https://engineering.careers360.com/articles/best-books-for-jee-main

Check below mentioned link for computer JEE online preparation course.

https://learn.careers360.com/knockout-jee-main-april/

Visit below mentioned link to get more information about JEE syllabus.

https://engineering.careers360.com/articles/jee-main-syllabus

Hope this information will help you

Best of Luck!!