Rohit writes,

“I’m using a Canon S3. It’s a simple SLR so and I’m a beginner. Is it a good camera for me?”

I haven’t tried that camera, but from the specs it certainly appears to have all the features you’ll need to learn photography.  As I often say, “It’s not the camera, it’s how you use it.” If you haven’t signed up already, please consider joining 12 Weeks to Better Photography!