You should choose the course according to your interest and passion. You can choose the course according to your interest from the given below list

1- Engineering

2- Architecture

3- Merchant Navy

4- Commercial Pilot

5- Bachelor of Science

6- National Defense Services-Indian Navy Officer, Indian Air Force

7- Railway Apprentice Exam

8- Business Administration and Management Studies

9- Commerce

10- Arts and Humanities

Good Luck!!

You can give following exams -

Jee Main - To be eligible for NITs/IIITs/GFTIs, either 75% in boards are required or you should be there in top 20 percentile. Also, Jee main can be given thrice and advanced twice consecutively when you are in 12th.

BITSAT - 75% should be there and 60% in PCM individually are mandatory.

VIT, SRM, Manipal - 60% are required aggregate in PCM.

State Level exams are also there and the eligiblity would be varied so please tell which state you belong to?

To know more about engineering entrances, you can go through the below provided website -
http://www.engineering.careers360.com/

Hope this helps!!!