Skill Progression

Characters start trained in skills from their class, and one from their background. Every 5 levels, characters may become trained in two new skills, become proficient in two skills that they are trained in, or become trained in one new skill, and become proficient in a different skill that they are already trained in.
 * Trained - Half Proficiency (rounded down)
 * Proficient - Proficiency
 * Expert - Double Proficiency