Vishal,
Any course you would join after twelve is going to take minimum of three years.
You should not choose a course just because it will lead you to high paid jobs. The course you choose to pursue should be of your Interest an it will eventually be going to lead you to success.
You can choose
-airforce
-army
-fine arts
-architecture
-networking

But always strive to hit the one with your interest.  
Thank you.

Dear Vishal,

It is advisable to choose your course according to your interest and skills so that you can perform good in the future and you can enhance your skills. 

If you want to do a course with good future scope it will take minimum 3 to 4 years to complete. 

You can check some below courses 

- Engineering

- Architecture

- Merchant Navy

- Commercial Pilot

- National Defence Services

 

If you are interested in automobile engineering it is one of the fastest growing industry. There is great demand in private and MNCs.

Make sure you complete your course from one of the top colleges to get good teaching and placements. 

There is lot of competition envolved to get into top colleges so make sure you prepare accordingly.

 

All the Best!!