You mean how to become a graphic designer? Best would be to go to art school and study for at least four years. And practice, practice, practice.
If you dont have the option of going to an art school, there are ways to become a pretty good graphics designer just at home. You need a LOT of time and patience, though. Look up online tutorials, and learn that way. Practicing is the most important way. Making banners, logos, and photoediting for free is a good way to start. Look for online graphics forums/communities such as DeviantArt. Good luck!
