Many certification courses are available online which you can take. Many free courses are also there. I would suggest you to do some and start working in some firm. You will gain hands on practical knowledge and also after that you will be able to move to other places with that experience in hand.

Regards

 Hello, 

to pursue career in mechanical engineering u dont have a good scope in india u dohave good oppurtunities in abroad and just complete ur btech and go for masters in abroad .

this can be a good choice but no other speical preparations will be there to take up mech.

,hope u will surely be beneficial  of this answer.

keep up hope.

all the best.

best regards for your future and  seccessful career.