Hello Killada,

IIT JEE advance is the second round of JEE exam conducted for admission into IITs.

Since the exam is on all India level, and the prize is too high, the competition is also very high. For preparing you may follow any strategy. When coming to study material, you may consult the dedicated crash course or study material of any reputed coaching institutes. You will easily find second hand-used coaching materials in you book market. Please make sure to choose any among the top 5 institutes preparing for JEE advance. You may also search for online contents, Some youtube videos are a great source for clearing your concepts. Apart from this, you may solve previous year papers. Please refer to the below link:

https://engineering.careers360.com/articles/jee-advanced-question-papers

https://engineering.careers360.com/articles/jee-advanced-2019

Refer to the syllabus too: https://engineering.careers360.com/articles/jee-advanced-syllabus

Hope this helps

Regards.