Engineering

It purely depends on what specialisation you are interested in and what are your parameters for evaluating a place of study. You would consider following facts before entering a college:
A) Faculty
B) Infrastructure
C) Placements
D) Practical exposure
E) Credibility
Nirma and UPES both qualify all the

IMUCET exam is compulsory for Merchant Navy after completing class 12th.

I am not going to go into the details regarding time management, schedule, etc. I will rather focus on some secrets most aspirants miss out, know yourself. Not everyone is a born genius. It's important to know where you stand, after starting preparation, it will hardly take 3 months to get to know y

Check out the courses offered by Vignan university for details :
https://www.shiksha.com/university/vignan-university-guntur-21507/courses?bc[]=10.

College change or university change after the first year is completely dependent on college and university norms, some university allow it and some won't plus you need to have good scores in the first year to apply for the same. For further details, contact the college authorities.

Yes, you can but you will not be able to get a good college.
Colleges giving admission on the basis of class 12th marks:
1. Amity University
2. Merit International Institute of Business Management- Ooty, Tamil Nadu
3. Coimbatore Institute of Technology-Coimbatore, Tamil Nadu
4. Jabalpur Engineering Coll

Yes, it is compulsory to apply for TNEA for admission in Madras Institute of Technology, follow the links below for details:
https://www.shiksha.com/b-tech/course/b-e-in-computer-science-and-engineering-madras-institute-of-technology-chrompet-Chennai-85047
https://www.shiksha.com/college/madras-insti

Follow the link below for all the required information:
https://www.shiksha.com/engineering/course/m-tech-Andhra-university-Visakhapatnam-171125.

If you haven't applied for KEAM examination then it's not possible, for more details check out the link below:
https://www.shiksha.com/b-tech/exams/keam.

Please elaborate your question, you want to join commerce college after class 10th?