Hello Darshan,
Thank you for your question and best wishes for success on Level 2.
In answer to your question about forecasting...I recommend checking out a library book or purchasing a book on corporate finance in which they teach you how to forecast a company's financial statements. If you look in the question thread above you will see a list of my recommended finance books. To find it quickly simply type and search on the name 'Gapenski' as that is my preferred book on corporate finance. My understanding is that the author has updated the book many times since I first read it; and I am guessing the book is now even better than before.
Once you have forecasted financial statements then you can use your CFA Institute skills to value the business. I recommend four valuation books but many like Aswath Damodaran's Investment Valuation.
With smiles!
Jason