To get a good salary and pay after you complete your btech in ECE make sure you get into good rather top NIT/IIIT's. Also after Btech the best will be doing Mtech and appear for GATE and even choose to do PSU jobs.

Also work on your academics. Keep a aim of appearing for GATE and prepare for it from the right time. NOT now but once you are in your 3rd/4th year for btech.

All the best!