after you win a certain amount of fights you will be allowed to level up and after the level up you will be able to choose a bonus to either your weaponry, armorments, your fighting capabilities etc.

EDIT: as gm I will set up your choices for level up but keep in mind after you level up you loose all the points needed to do so, ex: you need 300 points to level up to level 2 once you level up all 300 goes away and you left with the amount that's left