Dear apsirant , 

Your next step would be to prepare for engineering entrance exams like JEE MAINS and ADVANCED and get good marks in it and also in 12th std  ,your PHYSICS , CHEMISTRY AND MATHS marks should be good in order to get admission in best institutes like NIT , IIT . Get admission in computer engineering  or information technology engineering  in any institute . Get a good score in it and get a placement in a company as a software engineer and make it your career. 

You can also apply for other bachelor's degree courses like Bsc in computer science , Bachelor's in computer application etc : You can also get a placement in a company as a software engineer , but engineering field is always better than any other field. 

With a tag of an engineer , you can get a better salary than in any other field .

Hope it will help you .