Now I have been interested in linux.

I'm trying my best to use linux OS instead of winxp.

Though it is difficult at the beginning.
Congratulation into Linux world. There are lots of applications for you. Just try and visit on-line Linux communities. You can ask for help.

You can find out which linux version might suit you here.
You can get 8 versions of linux here.
You can get some useful help and information here.
And some more advanced information here.

I use both linux and windows.
Each has its strengths, and each has its weaknesses.
It's a personal choice, really.