India

The Chartered Institute for Securities & Investment is the largest and most widely respected professional body for those who work in the securities and investment industry in the UK and in a growing number of financial centres globally.
The industries you can work in thereafter-
Securities
Derivatives
Financial derivatives
Investment management
Commodity derivatives
Corporate finance
Risk in financial services

You may join Zee Institute of Creative Art, as this is a better institute to get into.

This is a choice you have to make. There is no harm trying for universities abroad. Check the requirements, funding options, scholarships and decide accordingly. International students have stringent requirements for medical and nursing fields so you must check thoroughly.

You can go for IIFT, JBIMS, BIMTECH, Symbiosis, etc.

Aviation has a lot of scope in india and abroad.
The various careers possible in this sector can be explored at the following link:
http://www.vidyavision.com/careers/aviationindustry.asp

The best university for B.Sc degree in India is Delhi University.

IGNOU is the best university for generic MBA and MBA in management functions such as Finance, HR, Marketing etc in distance learning. BITS Pilani WILP is the best university for MBA online on niche subject as Consultancy Management, Manufacturing Systems and Quality Management.

After compelting your class 12th, you need to write SAT exam. This exam will get you into Bachelor's degree. You can go to each college and check if they have BBA. The college will ask you for SAT and TOEFL/IELTS. So, you need to get a good score in IELTS/TOEFL as well. Once you have these IELTS/TOEFL and SAT, you can write a statement of purpose which is required in every US college.
For MBA, you will need to write GMAT after completion of your Bachelor's, then you can again follow the same process.

Hi Chintan,
Please go on below link for the best aeronautical colleges in India:
https://www.shiksha.com/top-aeronautical-engineering-colleges-in-india-rankingpage-49-2-0-0-0
All the best.

Dear Vishal,
You should apply for job now than after some time you may apply MBA course as distance education. Its may be give more & more job opportunity in your career. Also, you may apply for online course like as E-Commerce & Digital Marketing etc.
Best of luck.