If you've already worked your way through the Pathfinder Beginner Box adventure Black Fang's Dungeon, paizo have the 4 Beginner Box Bash demos that run at a few hours each, and can be run independently. These will be good if anyone else wants to try GMing, which is what I've been doing.
The the beginner box GM kit has an additional adventure that can follow on from Black Fang's dungeon, or run independently. It also contains details and advice for using pre-written adventures.
The Beginner Box Game Master's Guide has a lot of information for creating a simple adventure and a pre-drawn map (that fits on the included folding map mat) that you can play with to knock something together easily.
I'm working my way through all of this material with a group as a new GM and it's working great for us.
I've had a look at one of the Pathfinder Adventure paths (Carrion Crown), and their adventure paths run from first level, so I would recommend investigating the Rise of the Runelords Adventure path. I've not tried it yet, but it looks like some of the Beginner Box Bash stories will work into its story; it's going to be the next step we'll take when we're finished with the Beginner Box material.