Your rank in Jee Mains depends upon many factors like number of applicants fill the form, number of applicants finally appeared in the exam, number of questions asked in the exam, difficulty level of the exam, performance of the candidate, previous year's cut offs trends and this year's cut offs aren't out yet that's why we can't be absolutely sure about rank but as the cut off for PwD candidates are usually very low but still to get a rank around 600 you need to score well around 180+ only then you'll able to get Pwd rank below 1000.

Good Luck!!.