The success of his first restaurant was just 'beginner's luck'. [=he succeeded because he was lucky, as beginners sometimes are]
a swimming class for complete 'beginners' = a 'beginner' class
(..) would the best place be to begin? To navigate? That level of experience you do have? - Not a lot. - Some? Are you beginner? Beginner?, Beginner so that? Not you can go I laugh below if you are beginner. If you want to go for one year and to make you of experience puts you on the list. - If. (..)2007 Into the Wild