Handed:
Pick which hand you will be proficient with (left or right). The hand you pick will be your "Main-Hand". The other will be known as your "Off-Hand".
When wielding a weapon with your Off-Hand, there will be a -10 to Defense and Offense % rolls. This also applies to preforming Trade-Skills and Dexterity checks with the hand with which you are not proficient.
Next step: Characteristics, Rolling for: