There will be a couple of different ways to build your character, but your abilities and characteristics are on a Base10 System. You can build your character by rolling multiple (3) D4 dice and taking the combined total of the highest two rolled. You can then utilize this as one of your attributes (Might, Agility, Judgement, Guile, Endurance & Knowledge). You roll this six times, then assign the results as you desire.
More information on base attributes can be found in the basic rules.