Do you think that a female dog on it's second heat is able or old enuff to be bred???

I have a 1yr.3month old Rednose Fawn Pitbull. She is very energetic and can't keep still. But she has no attitude problem butI would like to make her listen to my comands more.I'm not tryingt o say that "Maka" is stupid, shes not!I just want tips on ...