alright this is really easy theres different stats like:

Agility
Strength
Charisma
Wisdom
Intelligence
Constitution
Dexterity
Reflex

roll the 20 dice twice (8 times) and ull have your stats all you have to do after is add them where you want to

well ya its pretty much the same but divided in three

agility is run jump etc

dexterity is more like aiming precision

and reflex are more like duck or evade an attack or block