no triceps then?
thats one of the biggest mistakes made by beginners! they overtrain biceps and completely neglect triceps, which causes injury. biceps are one muscle, and account for 1/3rd of your upper arm, triceps make up the other 2/3rds compromising of three seperate muscles, which are a harder to build than biceps. Have a look at some of the training splits on the LA muscle website (Y)
link
and like alexx said, it all means nothing without diet!!