Hi

7 months are enough for one to crack jee,  with full determination and motivation one can surely crack .

Just a proper strategy planning is required see

First of all NCERT  should be on your fingertips especially in the case of chemistry

Secondly One must practice at least any 2 books to enhance their questions solving skills like HC verma,  advanced organic chemistry, OP tondon are some good books which you should follow.

Also mock tests are very important as many mock exams you give more clearer your concepts will be.

Sone crash course will also be helpful incase you need some concepts understanding strategies.

Furthermore follow this link

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/study-plan-for-jee-main/amp&ved=2ahUKEwjFpPOu1pDxAhVe7XMBHZ9VCJ4QFjAAegQIAxAC&usg=AOvVaw0D4v51IeUmKRA8l8WRld99&ampcf=1