There are many options For You even, I think there is almost every career options are open to You be it in Science or Arts.

• If you are interested in Pure science then You can go for BSc from DU, IITs, IISc or any other university.
• If you are Interested in Engineering then appear for JEE MAIN in April and later in JEE Advance to get into most premier Engineering Institutes of India.
• Want to Join Indian army appear for NDA, Which will be held in the Month of April.

Even you can change your stream if you are no longer Interested in Science You can go for Other streams at your choice, so almost all opportunities are open for You just find You are passionate about what and then try to go for that field.

Hello Aspirant,
You will have plenty of options after 12.If you are not interested in engineering then you can do various other courses like BBA,BCA and then MBA and MCA to complete degree. You can also go in hotel management sector.You can prepare for government exams too with doing BSc with maths aside.
You will have to identify your inner strength and then you can persue your desired course.

I hope this helps.