Hi

If you start from today i.e. May, try to complete the whole syllabus by November by allotting a set of chapters for every month. Then from December, only attempt mocks and analyze each and every question properly.

Books to be used are:

Physics: HC Verma, NCERT, DC Pandey

Organic Chemistry: OP Tandon, NCERT

Physical Chemistry: N Avasthi, NCERT

Inorganic Chemistry: VK Jaiswal, JD Lee (newest edition), NCERT

Maths: RD Sharma, ML Khanna, NCERT 

Get complete JEE Main preparation tips here: https://engineering.careers360.com/articles/jee-main-preparation-tips.

Hope this helps.

Cheers!