Hi, I'm 17 years old about 5'2 and 112lbs, and currently I do, for biceps:
2 sets of 12-Bicep Curls (free weights) (total 30lbs)
2 sets of 12-Preacher Curls (total 30lbs)
12 hammer curls (total 30lbs)
I do these 3x a week, am I doing too much, too little, or am I on the right track? Thanks