I use four fingers. I'm not perfect, but the person who taught me was a concert classical musician, classical trained. She was not very strict about it though.. I told her "Look, I just want to play for myself for enjoyment, not perform on stage". She took it in stride and let me find my way with gentle prodding. But, I found that once I learned to use four fingers, I was able to increase speed and play more complex patterns. I still consider myself a beginner and have a long road ahead, but I'm enjoying myself
