Graduate / TO WORK AS AN STRUCTURAL ENGINEER [4]

I am a commerce graduate person from India,i had physics,chemistry & maths in my 12th class,but due to some reasons i had to opt commerce stream,now i am in position to choose any stream.i have a great desire to work in construction field like an structural engineer does.i am 23 years old now.can you all please suggest me what all possible ways are there for me to work in structural construction field considering my present age..

thank you...