We will be using the Pathfinder E6 rules
This will be a somewhat grittier, more realistic adventure than your typical Pathfinder game. Fighting a small number of guards will ALWAYS be challenging for adventurers. You are not immortal heroes.
There is no alignment
The world is not black and white. Even a good person may have a dark side to them. Because there is no alignment, there are no spells or abilities that depend on alignment, such as Protection from Evil or Detect Evil.
There is no divine magic
There is no seperation between arcane and divine magic. All magic follows the arcane rules and is therefore subject to arcane spell failure.
Use the instructions here to build your character.