I taught myself how to flatpick on guitar. Three years later, I found out that I held the plectrum incorrectly. Though I've learned the proper way (and will switch to it in order to tremolo a la Dick Dale), twenty-five years later I still can't shake it.
I started playing around the same time as you, and also hold the pick "incorrectly", using both the index + middle finger. It's only been in the last year or so that I've made any sort of effort to use just the index finger. It feels unstable, but faster in a way, and also easier to hybrid pick thanks to the middle finger being free.
