If you're wondering how to play a Human then you've got bigger problems than character generation in Pathfinder. I'm not going to waste time discussing how to be a Human. Rather, let's look at the different Human bloodlines and cultures and in Golarion so you can pick the country and culture you want you're PC to belong to.

Human Races of Golarion

What It Means To Be Human In Pathfinder

You get to put +2 in an Ability of your choice; a Human characteristic also inherited by the half races.

Humans learn faster than the other races and this is reflected by extra feats and skill ranks for Humans.

And that's pretty much it for the most boring race in Golarion.