If you are not interested in the engineering field then you have many other career option to improve your career like BBA, BCA, B.Sc, BMS,CA....etc.

Other courses:
BSC LIBRARY SCIENCE
ANIMATIONS AND MULTIMEDIA
DIPLOMA IN ITI
HOTAL MANAGEMENT
JOURNALISM
BFM

Here I am suggesting you the names of some good Options after 12th non medical except b.tech:

B.sc/M.sc/PhD - Mathematics, Applied Mathematics (Best option), Actuary Science (Best option), Statistics (Best option) .

B.sc/M.sc/PhD - Physics, Astrophysics (Best option), Metaphysics, Chemophysics, Biophysics, Nuclear Physics (Best option).

B.sc/M.sc/PhD - Chemistry, Biology, Biochemistry, Organics Chemistry (Best option), Analytics Chemistry (Best option).

B.sc/M.sc/PhD - IT, CS.

You can opt for an officer in defence services through NDA and you can join merchant navy.

Government exams on 12th basis:
Bank clarical
Railways
SSC
NDA
Air Force
NAVY