Anisha, you can also set the White Balance and the ISO according to the specs for the camera. Depending on what software you use to process your images, you can change some of these parameters, e.g., White Balance, in post processing. I have looked at your pictures on Photobucket and two points, when you photograph through window glass, you are adding another level of "interference" to your images, but sometime this is unavoidable. The other thing you might want to check on is to make sure that your horizons are level, again depending on the software you use in post-processing on your computer, images can be "straightened" to give a flat, rather than tilted, horizon. The real key when first starting out is just practice - practice - practice. This way you will truly get to know what your camera can do and what it can't. The nice thing about digital is, that if it doesn't work, then you can just delete it and try something else. Good luck in your journey into the world of photography.
Cheers,
WesternGuy.