Greetings of the day aspirant !

See , to crack any competitive exam it is necessary to have determination and have consistency for that exam. As , jee advanced not a joke it a national level of entrance exam so you have to study more hard if you really desperate to take admission through the jee advanced. You already said that you are starting from zero so you have to be consistent and more determined for your preparation . Don't panic , go easy with your preparation and work hard without taking any burden. I will suggest you some points that will help you in your preparation :

• Try to solve previous year question papers so that you get the idea of the questions and you will also know how to manage your time according to your paper.
• Give more hours to those concepts and subjects that are tough for you or that are week for you.
• Revision is also must , so try to revise your old concepts weekly.

If you go like this , then you will get definately the rank which you want.

I hope my solution will helps you.

Revert back for further query.

All the very best :-):-)