Hello Raghav,
I self-taught myself the skills of valuation by buying resources and then building my models in Excel. In this article's question thread I have highlighted my favorite books on valuation. I highly recommend this "hands on" approach because you must directly relate to the material in order to understand it. In other words, if you take a class, the knowledge remains in the mind and mouth of your instructor. You have to do the work yourself in order to develop understanding.
If you are unable to make your financial modeling skills tangible to employers then you are unlikely to get work in the field. This is a necessary first step and is why I so emphasized tangible skills in this article. If I were in your shoes I would make significant efforts to learn financial modeling - including valuation - before applying for additional work. It is after demonstrating these skills that you can separate yourself as a competitive candidate for research analyst positions.
As for the correct valuation model...I have very specific views on that topic that remain part of my proprietary edge. By involving yourself intimately with valuation you will learn which model or models best compliment the way your mind works and best exalts your skills.
Yours, in service,
Jason