Hi,

I would like to inform you that preparatory courses are offered by IITs which are for a period of one year. The seats are really very less for these courses. So there are extremely low chances that you may be able to get the preparatory course. I would suggest you to go for NITs through your JEE MAIN score or else take a drop for one year and give your exam next year as it will save one year of yours and you will be able to get a good NIT or IIT.