Hey Oliver. Long time no see, just found you on the "OSS CMS Drupal" Meetup. I am getting started with Drupal as well for some of my projects. Have you been to the New York Drupal User Group (http://groups.drupal.org/new-york-cit...)? They are much more established than this Meetup, I have been and had a great experience. They have a big event on Drupal theming on 1/23-24, you should check it out.