Career related query

thank you sir.now i am cleared about this thing.i have a doubt about my carrier? when i am in second year i chosed to be a design engineer and i took up classes in cad courses.and after some time passes i wont like it. but i am loving cars.but i dont no how to choose my carrier.
from the above lines please dont mistaken me that i will not doing things correctly. i will always choose my heart choice.
now i am telling about myself. i am studying final year mechanical engineering in coimbatore.in all my past semesters i will never attend the college as much and i am alwys have short attendance. but i never got arrears. i will pick up the studies even in last days to exam
(sir dont mistaken me im overconfidential im just telling about my character and im not lazy i will always active when the work comes)
before a month i get a idea in lightning harnessing.and i research in it. i found something but im not clear this thing because i have no guide to take that. iam a poor guy from a small village but i never become sad for that. i learned everything from my own.i have no any neighbours to help only my mother and friends are helping me.
so please can you help me what i have to choose and what i have to learn sir dont take this as just a message or thread it is a life of a children who may be in the age of your son or daughter or a brother. please think me as your family and help me to get a job sir and not only through this internet please give any your contacts and i am eager to learn sir i only need a guide or hand to pick me up.....!
thanking you
yours truthfully,
kumarappan.ks