Hi dear ,

              Admission in colleges accepting JEE main 2018 depends on rank of the candidate and cut off of the institute. These institutes include NIT's ,IIIT's,GIFT's and other state government colleges and universities accepting JEE mains score. You have very less score in general category so you are not eligible for any above mentioned colleges such as NIT ,IIIT thus you cannot get admission. Through JEE Main rank. Try for good private colleges.

All the best.