Most students, freshly out of school, try to choose an Engineering branch for themselves. You might be someone who has a deep passion for either Mechanical or CSE. In that case, I would advise you to follow your heart.
But if you think not opting for CSE is a bad decision, just ask yourself why you would consider CSE. Is it because you did some coding in your school days and wish to enter into that field, or simply because CSE is popular. Don’t be in the illusion of liking a branch just because everyone is recommending it. Also, don’t go for any branch solely because it has better placements than the other. As long as you enjoy a particular field, you will get good offers.
Mechanical is a good branch at NIT Silchar. Moreover, as research has become increasingly interdisciplinary in nature, various departments collaborate with one another these days. Even Mechanical has a good involvement of CSE- Robotics, CFD, etc. all involve high level coding and the knowledge of Data Structures. Because today most campuses witness IT placements more than core profiles, I would highly recommend you consult the alumni of Mechanical to figure out what placements are like in ground reality.
These are the 2022 placement stats for both the branches at NIT Silchar-
Also, NIT Silchar offers a branch change after the 2nd semester. This is based on your performance in the first two semesters. In case you feel dissatisfied with your choice, you can opt for branch change as well.
For your first year (whichever branch you choose) maintain good grades, talk to your seniors and explore your stream.