Hello,

See, the choice to go for a specific career is more dependent on one's areas of interest, skills, aptitude, job profile one is looking at to be working in future, from your profile it seems you are an engineering aspirant ,so I believe you must be having PCM combinations at 10+2 level, with this there are various options , for example i f you'r interested in technical field, you can go for Engineering/ Architecture course/Railway Apprentice Exam/AME Training, CPL Training, BCA .

In case you're interested in the field of Marine/Navy/Defence, you can appear for IMUCET, Indian Navy BTech Entry Scheme, Indian Army Technical Entry Scheme, Indian Navy Sailors recruitment,National Defence Academy.Naval Academy Examination

If you're academically inclined then you may you can do BS-MS Dual Degree from IISER, or four years BS degree program in IISC(Bangalore) through KVPY, you can also appear for NEST for 5 years integrated MSc program in NISER(Bhubaneshwar)/ UM DAE CABS(Mumbai), you can also go for graduation with majors in subject as per your preference like computer science, physics, chemistry, IT, electronics to name a few, or yo u can apply in Indian Statistical Institute for BSc Maths/Statistics.
after this you can qualify for CSIR NET/SET, become assistant professor or pursue PhD ,

or if you have an interest in the field of teaching, consider opting for Integrated BSc-BEd, this is good choice especially if you want to teach in school level,

Some of the best options outside your field are

NCHMCT JEE for Hotel Management,
NIFT, NID, AIEED for Fashion Designing,
AILET/CLAT/LSAT/LFAT/CUET/BHU UET to name a few for integrated law program
IPMAT/JIPMAT for integrated MBA in IIM Rohtak/Indore/Ranchi/Jammu/Bodh Gaya
Journalism and Mass Communication

Explore more detailed information regarding courses after 12th standard at https://www.google.com/url?sa=t&source=web&rct=j&url=https://school.careers360.com/articles/courses-after-12th-pcm/amp&ved=2ahUKEwj58t2zq9DyAhWbyTgGHRvUDfkQFnoECDIQAQ&usg=AOvVaw1M112gFBoqNI28Yv59mfVl&ampcf=1