Hello

Hope you are doing great as per the question asked by you, jee main is not enough to get any IIT. you should have to qualify jee advanced. Do work hard and should focus on achieving high and high in entrance exam it totally depends upon the examination if paper is simple then cutoff goes high gradually and if paper or examination is hard then cutoff goes down. You should certainly work hard and should try to achieve high and high in examination.

Hope you found this answer useful.Stay motivated stay positive.