Hello Aspirant.

As you've mentioned that around 25 days are left for JEE main examination. The best way for preparation in these times is solving previous years question papers and revising the syllabus that you're confident about. Don't panic if any topic is left, just focus on what you can prepare the best.

Also you can get access to career360 knockout course for JEE.

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

Best of luck