Martin, Welcome to HubPages!
(1) Click on the link below and it will take you to the Learning Center.
(2) There you will see three green round circles on the top right of the page. The first one is marked "Beginners Start Here." Click on that and on anything else you choose to learn about hubbing.
(3) When you're ready, log into your page, and click "start a hub" next to your name at the top right.