Electronics and Communication Engineering

18k rank in general category is very high. If you have got NIT Silchar, then it is not confirmed that you got the choice branch. Use prediction tool of Shiksha. For college prediction, refer to this link:
https://youtu.be/hOlit6Un7l0.

Make a comparison in both of them and be sure. For comparison, refer to the link attach with the answer. https://youtu.be/3YAzEP1vgvQ
After watching the link from the link, follow similar steps as described in the video.

Hi,
The total fees charged for B.E. in Electronics and Communication Engineering in Coimbatore Institute of Technology is approximately INR 2.12 Lakh.
Please refer the link below:
https://www.shiksha.com/b-tech/course/b-e-in-electrical-and-electronics-engineering-coimbatore-institute-of-technology-31634
Regards.

https://www.shiksha.com/b-tech/resources/kcet-college-predictor
Use the college predictor link. Good luck.

In India, R&D is always on the lower side. And hence, we almost never see anything great happening in the field of electronics (or for that matter, Technology). And hence most of the electronics graduates waste their time doing something else. If you seriously want to do something worth, please look beyond India. And, as soon as you finish your B.Tech, get into MS + Ph.D. courses. And, chances are very high that you will end up doing something meaningful in electronics.

Yes, it is good. It depends upon your performance and skills.