Hey 

Its okay if you are confused regarding your career and things . At your age it's alright to be a bit confused . As you are just 12th right now you can explore a bit and try and analyse your area of interest and accordinly you must make a choice that what attracts you the most and which stream has more Scope in futute

If you had mentioned the subjects we could have provided you witha a more specific answer butd epending on subjects you have and your inclination for a particular field you can choose an appropiate career.Engineering,Medicine,Law,Managenent.Commerce,

Pharma,Mass Comm, Architecture you have many choices just introspect yourself.