I have already a blog where i keep my all graphical work. <snip> But i want to more skiller so how can i a good graphics designer.
Hi shakirahmed12. Welcome to the forums. 
That’s pretty general question, and you should do some research of your own. Here are some useful resources to get you started:
I’ll close this thread, as you’ll no doubt be busy reading for a while. When you have some specific questions, though, please come back!