Tamil Nadu

Hindustan University is the best option for the plant training place based on the aeronautical engineering in Tamil Nadu.

Entry into 2nd year will not be possible. You will have to study from 1st year again. Universities don't allow admission into 2nd year on the basis of completing 1st year from elsewhere.

VITEE exam is not so tough as compared to JEE. So, you may crack it with the same preparation of class 12th.
And the beneficial point will be that there is no negative marking so you may attempt the questions too when you are not pretty sure.

See, in my opinion, it completely depends on you. Keep calm and think which work do you like most in both the fields. Skilled person can get infinite opportunities in both fields. And if you like both two then it is ECE because there are 3 scopes in it. First, you can go in CS other in Civil service

No, there is online examination conducted by VIT, in many cities all over the India.
All the best.

It is 60% aggregate which is required for the admission in the University. Also, you need to take VITEE exam which finally decides your fate.

You cannot get the main campus at this rank and getting the CSE branch at this rank is not even possible in any of the campus. You apply for the management quota, then you can get the main campus.

I am providing you some colleges list and I'll suggest you to go through the fee structure of each and every college and choose the one which fits in your budget:-
Colleges of Maharashtra
1. Rizvi College Of Engineering, Mumbai
2. Sinhgad College Of Engineering, Pune
3. MIT World Peace University, Pune

If you want to get admission in Hindustan University for AE. You must write the entrance exam for it and you have to get a good rank like below 5K. Then you will easily get admission in Hindustan University as it is the toughest branch.