I've completed by B.Sc (PCM) and joined LL.B. I am now in the 1st year but now, I want to quit LLB. What to do?

It's a great decision. Supporting to your parents, by doing a job is really appreciable. But finding a job on the basis of B.Sc. (PCM) is also an very difficult task. However few areas like teaching, Chemical and Physical laboratories, Sales and Marketing etc. May be the good short term options. But

LLB is a good choice. If you want to quit it, then you must have some other goal that you want to perceive and that has your interest. Do what you like but think carefully before taking any steps.