First of all, before doing any IT related course you need to think about what makes you plan your career in IT sectors and why are you unsatisfied with your current non-technical job. If you feel you want to make a career in IT jobs, then find out from resources like the Internet or career counselor which area of IT you want to get started with among various fields of IT and then find out from various resources by asking acquaintances in Linkedin or career counselor or from the internet what are the realities that exist in that particular area of IT that you want to start a career with. The realities exist in terms of availability of jobs in that area, way of recruitment in that area, nature of the job in that area, and future of in that area. They are some challenges while facing the realities and if you feel that you will be okay the challenges of the realities in that area of IT which you want to choose and you are passionate about the area of IT you want to choose, then you should continue to start a career in that area with your full-hearted passion, otherwise, think twice and look for another career.
Never leave your current job voluntarily unless you forced to resign. Try to keep your job and find out which IT career suits you and choose your IT career by the way that I have just mentioned in the previous paragraph. The more duration you are with your present job, the more experience you can gain that might come handy in the future when you work in a different company or work on another career in the future. If you are forced to resign, then you have to abide by the company's rule and resign. Requesting many times that you want to work to the company when you are told to resign is not good and it will cause violation of the company's rule and the company will take legal action against you. This will be more worse for you than leaving your job. In such a case, think what has happened to you in your previous job and try to rectify the mistakes that forced you to resign your previous job while making a career in your passionate and suitable field in IT. In such case, if you give interview in another company and you are asked about the reason of leaving your previous company, then you should not blame your company other than mentioning that culture or the job was not fitting for you or you are laid off due to the cost-cutting of the company.
Once you are passionate about something which will suit you, then you should not doubt whether you will get a job or not. According to the Indian context, you are 2015 pass-out and most mass recruiting MNCs may not consider you as they have a fixed hiring policy. Those MNCs will hire either freshly current year college pass-out candidates or highly relevant experienced candidates. They sometimes go to colleges for campus and pick some random students also. You don't have relevant experience but you don't have any doubt in it because India is going to become startup hubs that require valuable skills from you other than anything. So if you are extremely passionate about the IT career which you want to choose, then start by doing the course online and ask startup companies to hire you as an intern. But mind it your skills requires startup companies to get impressed. For that, you work on your projects to showcase your skills. Finally, whatever skills you want to learn, learn with your wholehearted passion, and keep it in mind that you need to give some value to the company while working on your skill.