I want to learn affiliate marketing. Is it possible to earn money from affiliate marketing.

Why not, Chandan? You can make money through affiliate marketing, provided you know how to go about doing it. First of all, it's not a magic business where you can make 1000/- every day just by getting affiliated, there is an investment and system involved. Learn the step by step system, and you will be on track but its tough work and time-consuming. I don't want to motivate you but throwing white lies around that you can become rich or you can make an excellent passive income in 90 days and so on. I know it a constant and consistent effort. Let me know if you need more inputs or step by step practical guidance.
 

Yes, you can make money.
1. Select affiliate company and pick your products, which is easy for you to an affiliate.
2. Select best products based on low competition, high pricing and high commission rates.
3. Understand the physiology of the particular customer for that specific product.
4. Play in consideration and decision-making stage.
Note- the last point is essential, people used to play with the awareness stage.

Yes,! But you need to find the right Affiliate Program( Profitable). There are popular affiliate programs among Indian Affiliate marketer - Amazon, Flipkart, Siteground, Bluehost, Commission Junction, and several others.
But before jumping to any Affiliate program, you have to need to find your interest first. If you are a writer, then find out which niche is suitable for you. And then create related content to bring targeted traffic. There are several ways to get traffic, but you need to understand what type of traffic you can bring quickly.
You can read about it online, or you can find a mentor/training centre to learn all these things. Before joining any coaching, make sure the trainer is experienced, and his teaching style is right.