You can pursue a diploma in Mechanical engineering like said in another answer if you are interested, but I'd suggest you finish your high school if you don't have financial constraints holding you back. 

What that will do is, it will give you a better idea of what to pursue in future, plus it will also give you more options. And don't forget the chance of getting admission into premier institutes like IITs, BITS, NITs etc if you finish your high school.