Hii!
You haven't mentioned the Subject stream with which you completed class 12th, whether it is PCM or PCB. But, you have an ample of career options after class 12th. You can either choose to continue further with the Science stream only or go ahead with arts or Commerce stream.
You can choose careers such as mbbs, bds, BHMS, bams, Nursing, Paramedical, engineering, architecture, Agriculture, forensics, computer science, IT, fashion designing, management, accountancy, literature, sports, journalism and mass media, etc.,
Analyse and know where you are interested and go for it. Choose wisely.
Hope this helps.
Good luck!