IIT

You should join a good coaching center. You will find good competition there. To prepare well, you need competition and guidance that will motivate you for your studies.

There are less chances for you to get admission in any of the IITs as your score is quite good, but not sufficient to get into IITs. Use the rank predictor to know your rank and if you are under top 8000, you can get a good IIT with good branch.
https://www.shiksha.com/b-tech/resources/jee-advanced-rank-predictor.

I don't think so, you can get electrical engineering branch in decent IIT at this mark even in OBC NCL category. But, your score is good, and best of luck.

In which college he get an admission, you can check it by clicking here:-
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor.

Use the rank predictor. If the rank is less than 10K you can get admission in any one of the IITs.

If you get any government college then definitely go for it and if not then you can try for any private college. Click this link to know the details:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
Good luck.

Mostly only one language (English) would be considered and the other language would be neglected.

No, you cannot get admission in IIT after qualifying ICAR. You need to qualify JEE Advanced exam to get into IIT.