With a JEE Main Rank of 42k, being from EWS, with a Category Rank of 6188, you have moderate to fair chances of securing a seat in some of the following Colleges

1. IIIT Ranchi, Kurnool, Una CSE, Dharwad AI

2. BIT Mesra Mechanical (Best Option, considering Placements, College Life, Faculty, Infrastructure, NIRF)

3. Chemical, Civil, Metallurgy at many NITs including Jaipur, Jamshedpur, IC NIT Jalandhar, Raipur, Hamirpur, Metallurgy NIT Nagpur, EC NIT Srinagar

4. EC/Electrical Top IIITs (Nagpur, Bhubaneshwar, Bhopal, Kancheepuram)

You should definitely check prospects in your Home State NIT. For more information and College Prediction do follow the link below

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