I need to make this clear, whatever your path, you will end up in Absalom as a petitioner to join the Society.
Unless you have helped to uncover some artifact and bring it to the Pathfinders' attention(and I'm not allowing that), there is no way to just jump right in, all have to follow the same path. We are going to go through Testing, Training and Confirmation. This involves 2 to 3 years of near-slavery. You had better want to be a Pathfinder something fierce.
Sure, you could just be a regular adventurer.
But with the Pathfinders, you get excellent leads, a globe spanning organization at your back, and world-class training... not to mention exclusive membership in one of the most influential and famous organizations in all of Golarion which daily helps to shape events around the world.