Hii..
As you ask about the skill for ECE ......so click here to know about the program of ECE and their importance about the field to know all this click here:
https://www.iiitd.ac.in/academics/btech/ece
All the best!!

Dear aspirant,
The skills are required for 1st year engineering students are c language and some basics in micro processor and some basics in aurdino board. If you have more interested then you can also learn data structures. Hope it helps you.
Thank you.