If you've never sailed before, how do you know if it's something you enjoy enough to want to spend the time to learn how? The First Sail Experience is a 2 hour sail with a certified sailing instructor, to let you try it out.
There are several sailing schools in the greater Seattle area that offer the First Sail experience, including Windworks Sailing and Powerboating, Seattle Sailing Club, the Center for Wooden Boats, Sail Sand Point, and Renton Sailing Center. More info on each of these schools is found on the "Local Sail/Power School" link under "Learn" above.
FREE: American Sailing Association's short, fun, online sailing course designed to familiarize you with the world of sailing. About 30-45 minutes
FREE: Short videos on a variety of skills for beginner sailors, with American Sailing Association Instructor Duncan Hood.
FREE: Introduces beginning boaters to the Navigation Rules for boats, by comparing to familiar rules of the road for cars. From the National Safe Boating Council
There are boating safety courses for sailors, power boaters, and even canoe and paddle-boarders here.