This question can't be given appropriately without knowing your strengths and weakness. If you are weak in Mechanics then the strategy will be one way and if you are strong in it then it will change. So you have to build up your own strategy depending on your own weakness and strengths. But we can make this easier for you. You can go through the link below to know about the chapterwise weightage of JEE MAINS and you can identify which you can prepare as per your strengths.

Link for JEE MAINS weightage:

https://engineering.careers360.com/articles/jee-main-syllabus-weightage

I hope this answer helps. All the very best for your for your future endeavors!