Hi dear ,
You may get or may not get admission in NIT , IIIT, GIFT in JEE main 2018 . You may not get admission in Home state as it depends on number of rank holders above you applying for same. There are only limited seats for SC category students in every NIT, IIIT's etc so may be rankers above you get admitted there filling that seats. You can also apply for outer states such as in Eastern region Arunachal Pradesh, Assam, Mizoram etc.
Admission in colleges depends upon Cut off list prepared by the colleges or by JoSAA. It depends upon your rank also.You should apply for counselling.
Try checking previous year cut off list and closing rank of NIT's and IIIT's. Also look for Deemed to be Universities , Private universities etc.
To know about expected colleges such as NIT's, IIIT's based on your Rank you can click on link below.
https://engineering.careers360.com/jee-main-college-predictor
All the best.

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