You are asking to clear JEE mains in 2 months so I am assuming that your in class 12th and preparing for your board exam.

lf you look syllabus of JEE main you can see that there is not a very dusting difference from class 12th board syllabus so yes now you have any advantage that syllabus for board exam is also the syllabus for JEE mains so now you can assume that you are not just preparing for 2 months already you are preparing for last many months so don't lose hope feel strong because whatever you read for class 12th will also be used for fall judgements now here are few tips which can be useful to excel in the JEE main exam.

start from solving the previous years questions because they are the one of the main key to get success in the JEE main exam also if somewhere is taken the problem don't blindly go for solution just use your head and try to take diploma in your brain so that you can get the solution but as you have very less time so use your time wisely if you are solving a problem then your time must be given to the problem itself and not thinking something else.

once you are done with the previous years papers then start giving mock test because mock test will give you the real feel of the exam and also you can judge yourself and your penis so just analyse mock test properly and work upon the week areas.

If you follow the above. Certainly you will be able to clear JEE main.