Beginner's Luck

It was in my late twenties when I started working bin a cram school. Everyday I have needed to have many classes so naturally I had been frustrated. It was then I started to visit amusement hall, in Japan we say 'game centre'.
I have never had gambles but then I did blackjack in a game centre.
I didn't know how to do so I just tried clicking without any intention. The figure became astronomical number when I noticed. The figure became less and stable after I realised how to play.
I think it was a beginner's luck. It was a part of just a playing game. The figure didn't reflect any real money.