Make ten Chain Stitches. Ok, now you wrap the yarn around the hook. Put the hook through the third Chain Stitch from the hook. Wrap the yarn around the hook and pull it through. You have three loops on the hook. Wrap the yarn around the hook and pull it through the first two loops. Wrap it around again and pull it through the last two loops. That is Double Crochet.
Practice it and look for my next post on How to do Triple Crochet.