As mentioned earlier, perks are the bread and butter of character creation. While your skill level in a skill typically improve various aspects of said skill, perks typically have a more sigificant effect on what your character can do with your skills. Your skill level determines what perks you can buy in each skill tree, and of course increasing your skill level increases your character level, which gives you more perks to distribute. The bulk of this character creation section, then, will be dedicated to the skills, and what perks are worth your attention.
You gain one perk per level, and after you’ve spent a perk the only way you can get it back is by maxing that skill’s skill level, then making it legendary and resetting the skill level to 15, so spend your points carefully! You can save up perks as you level up, so don’t feel compelled to invest them immediately.