I am in engineering (mechanical) 2nd year then what should I have any carrier plans for my future ?
After Mechanical Engineering you may consider these options for your further education
Aerospace
Robotics
Environment Engineering
Solar
Through that you would get opportunities in private and govt sector too.
All the best
Boost your concepts of SOM, manufacturing and material science. Make yourself OK with basic concepts of Thermo and fluid. If possible work on some projects under profs or clubs.
I'll suggest to go for Industrial training after 3rd year.
Hope that helps.
BTW I've completed 3rd yr in ME.

You have se good options like prepare for gate, upsc, IT jobs, core jobs, Indian army, Navy, Bank, Railway engineers. My suggestion is if youre interested in IT then start learning some technical languages now like c, Java etc.., because future will depends upon machine learning, artificial intelligence etc.. and after 2 years you can do mba Because almost best b schools required experience. And if you wish to go and opt core sector, you. Need to prepare for gate from now onwards, and it. Sb get you a job, it can fetch you seat for Mtech in top IITs/NIT's. And almost if you prepare for gate, almost all you'll clear entrance exams.
All the best. Take wise decision.