Polytechnic

Hi Danbeer,
You cannot take admission in IITs after completing polytechnic as you will need to require to attempt for JEE Mains exam. You can only sit for JEE exam after completing class 12th. So, I am afraid you can only have a chance to get into IITs for Masters after completing B.Tech through lateral entry admission.
All the best.

You can take admission in Diploma in engineering based on your 10th class results. On completion of Diploma in engineering, you are eligible to seek lateral entry admission in B.Tech second year.

You can check: http://www.ouat.nic.in/agro_polytechnic

I would recommend you to repeat the year with more dedication and hard work as it's your second year and leaving the course will completely be a bad option as your 2-years will be wasted. Has it been the first year, you still can think of joining another course.

You can get admission in Government Polytechnic College, Tonk and R. C. Khaitan Government Polytechnic College, Jaipur.

Hi Ayan,
You will have to go for science stream with mandate maths to pursue ITI later after class 12th. You cannot pursue ITI being from commerce, arts or humanities stream.
All the best.

Check the below link for Polytechnic/Diploma institutes in India -
https://www.shiksha.com/engineering/colleges/diploma-courses-india

Try to study hard in the subject, you've got low and marks and join any coaching and improve your skills.