How to Build Your Character

First check out Challenges.
Figure out what kind of character you want to be based off these skills.
Next pick out your origin and adult life in Background 
After that get into Attributes  or Skills to plan your levels.

Break down of leveling.
Every Level you get 1 Point
You can put these points into one of the two main attributes body/mind or skill.
Once you put these points into that skill you gain two points in the skill.
1 body = 2 body points
1 mind = 2 mind points
1 skill = 2 skill points
You can puts the points in any of the  minor attributes creating 3 perk points to buy levels of perks.
If you put it into skill you just gain two skill points to buy levels in a weapon skill.