NO. A job is not assured even after graduating, doing post-graduation and so on. The purpose of learning Gita is not to get a job. Only if you study you will get marks. Only if you pass you will be placed on job. In that process even if you fail or you get one or two marks less than you expected, you will not commit suicide if you have the wisdom of Gita.
The benefit of learning Gita is how to do the job properly and efficiently in a relaxed way. All with a smile. Then success shall be yours.