Dear Candidate,

Your JEE mains score will be valid only for NITs,IIITs,CFITs and private colleges.It will not get you into a government engineering college.For government engineering college your boards marks will be considered.So if you aim getting admission into a government engineering college you should focus on your boards score.Or else at 50 percentile as you are from ST category you can land a descent private engineering college.Best of luck.

To choose from the best colleges you can also use the following link-

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer