Hi Ayan,

I suggest you join some good private Btech college which is providing the engineering in Computer Science branch. Then study hard there and prepare for GATE. GATE is an exam for admissions in PG courses in IITs and IISC and NITs, the top engineering colleges in the country. As your marks are quite low you won't be able to get into any government engineering college for Btech. But if you are interested in engineering then do join some private college and then clear the GATE.

More on GATE and colleges:-

https://engineering.careers360.com/exams/gate
https://engineering.careers360.com/articles/psu-recruitment-through-gate
https://engineering.careers360.com/colleges/list-of-private-engineering-colleges-in-india

Comment your doubts, if any.

Thank You.