Well Cor just basics I'd say go to the
ASA website. To get a leg up on
learning the basics.. they have a free course that will help out the extreme beginner. For the
novice sailer that already knows the
parts of the sailboat and basic seamanship, like who has the right of way. Knowing port from starboard, forward from aft.. you'll need either physical
classes or find a friend that would be willing to take you sailing when they go out.
https://asa.com/online-sailing-course/ it called my first sail.. this is the course that I was talking about for the very beginner